Re: [sage-devel] ALGLIB spkg is released (second version)
Hello, Carl. You wrote 29 июля 2010 г., 2:40:14: > Sure, I can help. I have some API questions first. Thanks a lot! > What are the bool and int vectors and matrices used for? (Sage > doesn't really have vectors or matrices of booleans or of machine > ints. It has vectors and matrices over GF(2) (integers mod 2, so > 1+1=0), which could be used as booleans. There are also numpy arrays > and matrices of these types.) I've made quick check and, to my surprise, there is no ALGLIB function which is accessible from Sage and accepts/returns boolean vector or matrix :) But I think that this feature should be supported in case such function will appear in future. Integer vectors are used to store permutation tables (LU decomposition and related functions), by fitting functions (to specify derivative information) and by several other functions. Integer matrices are not used by functions accessible from Sage, but again I recommend to support them. > My suggestion would be to support Sage vectors and matrices over > GF(2), RDF, and CDF (machine floats and complex numbers), as well as > numpy arrays and matrices of appropriate types. +1 My proposal is to make * boolean vector/matrix = GF(2), RDF (non-zero = True) * integer vector/matrix = RDF * real = RDF * complex = CDF >> because ALGLIB uses Python's list-of-lists to store matrices, and Sage >> uses its own matrix class. But only several functions from _alglib.py >> have to be fixed to work with Sage matrices/vectors: >> * safe_len/safe_cols/safe_rows >> * is_bool_vector/is_int_vector/is_real_vector/is_complex_vector >> * is_bool_matrix/is_int_matrix/is_real_matrix/is_complex_matrix >> * x_from_list/x_from_listlist Sorry, I've forgot to add several functions to this list: * bool_vector_from_x/bool_matrix_from_x * int_vector_from_x/int_matrix_from_x * real_vector_from_x/real_matrix_from_x * complex_vector_from_x/complex_matrix_from_x x_from_list/x_from_listlist are used to convert from Python to ALGLIB, and this functions are used to convert in backward direction. Within 8 hours I'll write in more details about these functions. -- With best regards, Sergey mailto:sergey.bochka...@alglib.net -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Re: Two questions about sliders in interacts
On 7/28/10 11:31 AM, Harald Schilly wrote: On Jul 28, 6:07 pm, kcrisman wrote: 1) Endpoint markers for the sliders. I think that was already requested some time ago, I'm not sure, and I think that's quite important. Something else I heard was to be able to change the color - i.e. to match it with the color of a plotted line. Both of those are great ideas and should be put up on trac. Hopefully, there will be lots of development of the notebook and interacts in the next few years, so we'll have a chance to really polish these things and implement all of these great ideas. Thanks, Jason -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Re: new keywords for limit()
On 7/27/10 12:23 PM, D.C. Ernst wrote: I'm not particularly in love with "from_*" and I am certainly agreeable to changing it (as suggested earlier or otherwise). Can we use the symbols "+" and "-"? This most closed mimics the standard notation and is concise. Thoughts? +1 on the '+' and '-'. If we had that syntax, that's what I'd teach my students to use since they'd already be using it in the classroom. Thanks, Jason -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Cached function decorator interferes with documentation
It would appear that the @cached_function decorator prevents the decorated function from appearing in the HTML reference manual. Evidence is sage.functions.special.maxima_function() sage.structure.dynamic_class.dynamic_class_internal() sage.graphs.graph_latex.setup_latex_preamble() The @options decorator doesn't seem to have the same effect, for example sage.graphs.generic_graph.graphplot() comes through into the documentation just fine. I couldn't find anything in Trac about this. Are there examples where a cached function survives into the documentation? Thoughts on a cause or a solution? Rob -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
Re: [sage-devel] "is" and python integers
On Wednesday, July 28, 2010, Carl Witty wrote: > On Wed, Jul 28, 2010 at 7:07 PM, William Stein wrote: >> On Wednesday, July 28, 2010, kcrisman wrote: >>> But for True and False, we would rather have >>> >>> if n is True: >>> >>> not >>> >>> if n==True: >>> >>> correct? I've seen that cause some problems in code I've reviewed, >>> where things that shouldn't be True were True. >>> >> >> I would use >> >> If n: >> >> If you want to make sure n is a book, do: >> >> if isinstance(n,bool) and n: > > I disagree. I think "n is True" is fine. It works, and it's > documented to work; "bool?" says, > Returns True when the argument x is true, False otherwise. The > builtins True and False are the only two instances of the class bool. > so there can't be any booleans that are true other than True. > > (And "n is True" is going to be vastly faster than "isinstance(n, bool) and > n".) You're right - I stand corrected. > > Carl > > -- > To post to this group, send an email to sage-devel@googlegroups.com > To unsubscribe from this group, send an email to > sage-devel+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-devel > URL: http://www.sagemath.org > -- William Stein Professor of Mathematics University of Washington http://wstein.org -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Re: "is" and python integers
On 7/28/10 7:35 PM, Carl Witty wrote: On Wed, Jul 28, 2010 at 7:07 PM, William Stein wrote: On Wednesday, July 28, 2010, kcrisman wrote: But for True and False, we would rather have if n is True: not if n==True: correct? I've seen that cause some problems in code I've reviewed, where things that shouldn't be True were True. I would use If n: If you want to make sure n is a book, do: if isinstance(n,bool) and n: I disagree. I think "n is True" is fine. It works, and it's documented to work; "bool?" says, Returns True when the argument x is true, False otherwise. The builtins True and False are the only two instances of the class bool. so there can't be any booleans that are true other than True. (And "n is True" is going to be vastly faster than "isinstance(n, bool) and n".) For me, I use "is" when comparing with None, and if I specifically want *True* or *False* (e.g., if I don't want the empty list to count as False). Thanks, Jason -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
Re: [sage-devel] "is" and python integers
On Wed, Jul 28, 2010 at 7:07 PM, William Stein wrote: > On Wednesday, July 28, 2010, kcrisman wrote: >> But for True and False, we would rather have >> >> if n is True: >> >> not >> >> if n==True: >> >> correct? I've seen that cause some problems in code I've reviewed, >> where things that shouldn't be True were True. >> > > I would use > > If n: > > If you want to make sure n is a book, do: > > if isinstance(n,bool) and n: I disagree. I think "n is True" is fine. It works, and it's documented to work; "bool?" says, Returns True when the argument x is true, False otherwise. The builtins True and False are the only two instances of the class bool. so there can't be any booleans that are true other than True. (And "n is True" is going to be vastly faster than "isinstance(n, bool) and n".) Carl -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
Re: [sage-devel] "is" and python integers
On Wednesday, July 28, 2010, kcrisman wrote: > But for True and False, we would rather have > > if n is True: > > not > > if n==True: > > correct? I've seen that cause some problems in code I've reviewed, > where things that shouldn't be True were True. > I would use If n: If you want to make sure n is a book, do: if isinstance(n,bool) and n: > - kcrisman > > -- > To post to this group, send an email to sage-devel@googlegroups.com > To unsubscribe from this group, send an email to > sage-devel+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-devel > URL: http://www.sagemath.org > -- William Stein Professor of Mathematics University of Washington http://wstein.org -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Re: "is" and python integers
But for True and False, we would rather have if n is True: not if n==True: correct? I've seen that cause some problems in code I've reviewed, where things that shouldn't be True were True. - kcrisman -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
Re: [sage-devel] bug in solve?
ok, i got my first mistake,
the first line in the functoin schould be this:
variables = [var("w" + str(i))for i in range(s.nvertices())]
but anyway, no reason for such a big problem.
Am 29.07.2010 01:15, schrieb Johannes:
> i just tried something with solving a equation, i think i did it the
> wrong way, but still it should not result in this:
>
> def calc_wights_by_sum(s)
> variables = var(["w" + str(i) for i in range(s.nvertices())])
> equation = reduce(lambda f1,f2: f1 + f2, [variables[i] * s.vertex(i)
> for i in range(s.nvertices())]) == 0
> print equation
> return solve(equation,variables)
>
> sage: calc_wights_by_sum(s)
> False
> Exception RuntimeError: 'maximum recursion depth exceeded in
> __subclasscheck__' in ignored
> Exception RuntimeError: RuntimeError('maximum recursion depth exceeded
> in cmp',) in Exception RuntimeError: 'maximum recursion depth exceeded
> in __subclasscheck__' in ignored
> ignored
> Exception RuntimeError: 'maximum recursion depth exceeded in
> __subclasscheck__' in ignored
> Exception RuntimeError: RuntimeError('maximum recursion depth exceeded
> in cmp',) in Exception RuntimeError: 'maximum recursion depth exceeded
> in __subclasscheck__' in ignored
> [...]
>
> i just helped to kill python by killall -9 python.
>
> greatz Johannes
>
>
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[sage-devel] bug in solve?
i just tried something with solving a equation, i think i did it the
wrong way, but still it should not result in this:
def calc_wights_by_sum(s)
variables = var(["w" + str(i) for i in range(s.nvertices())])
equation = reduce(lambda f1,f2: f1 + f2, [variables[i] * s.vertex(i)
for i in range(s.nvertices())]) == 0
print equation
return solve(equation,variables)
sage: calc_wights_by_sum(s)
False
Exception RuntimeError: 'maximum recursion depth exceeded in
__subclasscheck__' in ignored
Exception RuntimeError: RuntimeError('maximum recursion depth exceeded
in cmp',) in Exception RuntimeError: 'maximum recursion depth exceeded
in __subclasscheck__' in ignored
ignored
Exception RuntimeError: 'maximum recursion depth exceeded in
__subclasscheck__' in ignored
Exception RuntimeError: RuntimeError('maximum recursion depth exceeded
in cmp',) in Exception RuntimeError: 'maximum recursion depth exceeded
in __subclasscheck__' in ignored
[...]
i just helped to kill python by killall -9 python.
greatz Johannes
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Re: [sage-devel] ALGLIB spkg is released (second version)
On Mon, Jul 26, 2010 at 4:43 AM, Sergey Bochkanov wrote: > Hello! > > Second beta of ALGLIB.spkg is ready. It can be downloaded from > http://www.alglib.net/share/2010-07-26-alglib-for-sage/ Cool. Compiles for me, but I didn't try any tests. > -- SAGE INTEGRATION -- > > Well, ALGLIB can be called from Python and Sage by now. But I think > that more can be done to integrate it with Sage. For example, we can't > write > > sage: A = Matrix([[3,2],[2,3]]) > sage: matdet.rmatrixdet(A) > > because ALGLIB uses Python's list-of-lists to store matrices, and Sage > uses its own matrix class. But only several functions from _alglib.py > have to be fixed to work with Sage matrices/vectors: > * safe_len/safe_cols/safe_rows > * is_bool_vector/is_int_vector/is_real_vector/is_complex_vector > * is_bool_matrix/is_int_matrix/is_real_matrix/is_complex_matrix > * x_from_list/x_from_listlist > > I think that it is very easy to do for someone familiar with Sage > internals. Anyone interested in helping me with this issue? Sure, I can help. I have some API questions first. What are the bool and int vectors and matrices used for? (Sage doesn't really have vectors or matrices of booleans or of machine ints. It has vectors and matrices over GF(2) (integers mod 2, so 1+1=0), which could be used as booleans. There are also numpy arrays and matrices of these types.) My suggestion would be to support Sage vectors and matrices over GF(2), RDF, and CDF (machine floats and complex numbers), as well as numpy arrays and matrices of appropriate types. If people think this is the right choice, I can help write the code. Carl -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Additive Abelian Groups
First, kudos to David Loeffler for implementing AdditiveAbelianGroup's (now in 4.5.2.alpha1) and to John Cremona and Jim Stankewicz for chasing through referee-ing the patches. 1. __call__ seems to chase its way up into the free module classes, where it fails in some constructions of quotient modules and generator matrices. In the "remember_generators" case would this be as simple as forming the right linear combination of the generators (which seems to work for me "by hand")? Or is there another way to construct individual elements? G = AdditiveAbelianGroup([3,4]) a = G((1,2)) Traceback (most recent call last): File "/sage/sage-4.5.2.alpha1/local/lib/python2.6/site-packages/sage/ modules/fg_pid/fgp_module.py", line 483, in __call__ raise TypeError, msg TypeError: length of v must be at most the number of rows of self 2. submodule() and is_submodule() seem to perform as expected and the former returns a group. Would implementing subgroups be about as simple as calling these routines? Rob -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Re: "is" and python integers
Indeed, in python/src/Objects/intobject.c we have: - #ifndef NSMALLPOSINTS #define NSMALLPOSINTS 257 #endif #ifndef NSMALLNEGINTS #define NSMALLNEGINTS 5 #endif #if NSMALLNEGINTS + NSMALLPOSINTS > 0 /* References to small integers are saved in this array so that they can be shared. The integers that are saved are those in the range -NSMALLNEGINTS (inclusive) to NSMALLPOSINTS (not inclusive). */ static PyIntObject *small_ints[NSMALLNEGINTS + NSMALLPOSINTS]; - Good to know indeed! -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
Re: [sage-devel] "is" and python integers
On Wed, Jul 28, 2010 at 1:28 PM, William Stein wrote: > On Wed, Jul 28, 2010 at 1:14 PM, Jason Grout > wrote: >> Someone pointed this out to me recently, and it sounded like a useful gotcha >> to know about python. Apparently small python integers are cached, while >> larger ones are not. Sometimes. >> >> % sage -ipython >> Python 2.6.4 (r264:75706, May 25 2010, 15:42:09) >> Type "copyright", "credits" or "license" for more information. >> >> IPython 0.9.1 -- An enhanced Interactive Python. >> ? -> Introduction and overview of IPython's features. >> %quickref -> Quick reference. >> help -> Python's own help system. >> object? -> Details about 'object'. ?object also works, ?? prints more. >> >> In [1]: a=1 >> >> In [2]: b=1 >> >> In [3]: a is b >> Out[3]: True >> >> In [4]: a=1000 >> >> In [5]: b=1000 >> >> In [6]: a is b >> Out[6]: False >> >> In [7]: a=1000; b=1000; a is b >> Out[7]: True >> >> >> Note that these are *python* integers, not Sage integers, in the example >> above. Note also that if the two integers are on the same line, the *are* >> the same object. > >> So moral of the story: be *very* careful about where you use "is". > > Big +1 ! This is something that always sets of my warning bells when > refereeing code. Same thing goes for small/interned strings. sage: 'aa' is 'aa' True sage: 'aa' is 'a'*2 False - Robert -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
Re: [sage-devel] ZZ(expr) != int(expr)
I've created a bug report about this:
http://trac.sagemath.org/sage_trac/ticket/9627
Soroosh
On Wed, Jul 28, 2010 at 2:58 PM, Harald Schilly wrote:
> Hello sage-devel, I got this from the "report a problem" bugreport
> (observed on sagenb.org) and I can confirm this using sage 4.5, ubuntu
> 10.4, intel 32bit
>
> The problem is that a big integer expression is not converted
> correctly to a Python 'int'
>
> sage: z = var('z'); f(z) = z^2 + 1
> sage: def ppol(n,z):
> g = f(z)
> for i in range(0, n-1):
> g = f(g)
> return g
>
> sage: h = ppol(9,1)
> sage: h
>
> 3791862310265926082868235028027893277370233152247388584761734150717768254410341175325352026
> sage: type(h)
>
> sage: ZZ(h)
>
> 3791862310265926082868235028027893277370233152247388584761734150717768254410341175325352026
> sage: int(h)
>
> 3791862310265926082868235028028848611706634562188571520717816257498752565976400597161607168L
>
> --
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> http://groups.google.com/group/sage-devel
> URL: http://www.sagemath.org
>
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Re: [sage-devel] "is" and python integers
On Wed, Jul 28, 2010 at 1:14 PM, Jason Grout wrote: > Someone pointed this out to me recently, and it sounded like a useful gotcha > to know about python. Apparently small python integers are cached, while > larger ones are not. Sometimes. > > % sage -ipython > Python 2.6.4 (r264:75706, May 25 2010, 15:42:09) > Type "copyright", "credits" or "license" for more information. > > IPython 0.9.1 -- An enhanced Interactive Python. > ? -> Introduction and overview of IPython's features. > %quickref -> Quick reference. > help -> Python's own help system. > object? -> Details about 'object'. ?object also works, ?? prints more. > > In [1]: a=1 > > In [2]: b=1 > > In [3]: a is b > Out[3]: True > > In [4]: a=1000 > > In [5]: b=1000 > > In [6]: a is b > Out[6]: False > > In [7]: a=1000; b=1000; a is b > Out[7]: True > > > Note that these are *python* integers, not Sage integers, in the example > above. Note also that if the two integers are on the same line, the *are* > the same object. > So moral of the story: be *very* careful about where you use "is". Big +1 ! This is something that always sets of my warning bells when refereeing code. E.g., I don't like this sort of construction, but saw it recently in a patch on trac: def f(n=1): if n is 1: ... else: ... -- William > > Thanks, > > Jason > > -- > To post to this group, send an email to sage-devel@googlegroups.com > To unsubscribe from this group, send an email to > sage-devel+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-devel > URL: http://www.sagemath.org > -- William Stein Professor of Mathematics University of Washington http://wstein.org -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] "is" and python integers
Someone pointed this out to me recently, and it sounded like a useful gotcha to know about python. Apparently small python integers are cached, while larger ones are not. Sometimes. % sage -ipython Python 2.6.4 (r264:75706, May 25 2010, 15:42:09) Type "copyright", "credits" or "license" for more information. IPython 0.9.1 -- An enhanced Interactive Python. ? -> Introduction and overview of IPython's features. %quickref -> Quick reference. help -> Python's own help system. object? -> Details about 'object'. ?object also works, ?? prints more. In [1]: a=1 In [2]: b=1 In [3]: a is b Out[3]: True In [4]: a=1000 In [5]: b=1000 In [6]: a is b Out[6]: False In [7]: a=1000; b=1000; a is b Out[7]: True Note that these are *python* integers, not Sage integers, in the example above. Note also that if the two integers are on the same line, the *are* the same object. So moral of the story: be *very* careful about where you use "is". Thanks, Jason -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Re: hyperbolic geometry and fundamental domains for subgroups of PSL(2,ZZ)
On 23 Jul., 01:38, Vincent D <20100.delecr...@gmail.com> wrote: > Thank you very much for the precise answers. > > I need to do some computations with subgroups of PSL(2,Z) (not only > beautiful drawings). I also implemented some stuff to do the things I > want but it would be nice to fit the general framework. I'm starting > reading what is yet in Sage and planned to work on it in August. I'm > ready to write some patches for this. I can help to write some code, > read and transfer yours into Sage. Will you have time to work also in > this summer period? Would you share the code you wrote? > Good to hear! Sorry for the delayed answer, I'm pretty ill at the moment. I saw your post at sage-nt, my next answers (and questions :-)) will go there. In the second half of August and the first days of September, I will have no acces to a computer or email or internet. But till then, we might share some code and insights (and from September on, of course, too). Cheers, Georg -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Re: Report from useR! 2010
Also, some of you may be interested in the fact that Richard Stallman spoke (at some length); unfortunately, I was not able to stay that long. Audio files are at http://www.r-statistics.com/, currently the top post. - kcrisman -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] ZZ(expr) != int(expr)
Hello sage-devel, I got this from the "report a problem" bugreport
(observed on sagenb.org) and I can confirm this using sage 4.5, ubuntu
10.4, intel 32bit
The problem is that a big integer expression is not converted
correctly to a Python 'int'
sage: z = var('z'); f(z) = z^2 + 1
sage: def ppol(n,z):
g = f(z)
for i in range(0, n-1):
g = f(g)
return g
sage: h = ppol(9,1)
sage: h
3791862310265926082868235028027893277370233152247388584761734150717768254410341175325352026
sage: type(h)
sage: ZZ(h)
3791862310265926082868235028027893277370233152247388584761734150717768254410341175325352026
sage: int(h)
3791862310265926082868235028028848611706634562188571520717816257498752565976400597161607168L
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[sage-devel] Report from useR! 2010
Dear all, I recently got back from useR! 2010, the R user conference. This was the second time the conference was held in the US, this time at NIST (a government agency in suburban DC). The most important thing for Sage folks is probably the talk I gave: http://www.sagenb.org/home/pub/2270/ The reception was very positive, and I hope that will lead to some future collaboration, or at the very least higher awareness of Sage in the R community. They really liked interacts - no surprise - and that it was painless to download R packages, even in the notebook! So good results - especially considering I was only there for 24 hours. However, there were some very intriguing things I gleaned from the various talks and the overall atmosphere. I'll try to summarize these below. ++ First, the community was clearly a community, and a large and healthy one. There were probably 400-500 attending from all over the world, from government, industry, health fields, corporations, analytics, and of course academia, though this last was not even a plurality, I think. People knew each other, and many were people *not* in the academy who were connected to R via R user groups (see http://blog.revolutionanalytics.com/local-r-groups.html), which apparently are pretty common and for which people actually get together to learn about R and socialize on a regular basis. And on the plus side, long-time users agreed that 10 years ago R was pretty small, and now it's just been exploding. So I think it is quite likely "the time is right" for other open source solutions of the third wave (or whichever wave this is). What else can Sage do to promote community outside of the Sage Days type participants? ++ Second, there was some very frank discussion of R's shortcomings (as good as it is) which might be relevant to Sage - sometimes making Sage look ahead of the curve, other places not. I'll try to categorize them. 1. The corporate perspective. Essentially, many people made the point (including from Merck, P&G, Ancestry.com, and Facebook) that R is great, but concerns about tech support, varying stability of packages, integration with MS Office, etc. yield many companies to have R under the hood but not in interactions with VPs or other end users. One big solution to that is that several companies have started up to offer supported R solutions, either to train new users or to provide specific commercial support to specific versions of R. They are apparently doing well! I see this as relevant to Sage in a number of ways, but certainly when it comes to potential engineering users and schools hesitant to/unable to set up their own Sage servers. 2. Speed and scalability. These are of course related to the previous one from the org perspective, but also bring technical challenges. In particular, several people mentioned in talks that R needs to be much more scalable to HUGE data sets, performance needs to improve, and R is slow. There were several things in the works with this last thing - include something like Cython, and others not - and there is also work on things like using multiple cores *intelligently* (since it slows some stuff down a lot) and enabling arbitrary size input by avoiding memory, etc.Performance issues are important in real-time environments. Several people were very interested in Cython when I pointed it out, and I think we are ahead because Python has some parallelization stuff, right? But it was clear that this kind of thing is a big issue in the big picture. 3. Don't be too clever. This was less often mentioned, but the sense was that R is so good for graphics and visualization that sometimes things are too informative, and post-processing is needed for the end user. I don't think this happens with graphics per se in Sage, but sometimes it is true that things get clever in Sage too, I suspect. Any examples of end users being confounded by this? ++ Finally, there was a good talk by an R blogger about promotion in general and blogging in particular. See for example http://www.r-bloggers.com/ . I think that especially Fredrik, Minh, and Martin have done a good job with this, but we can do more. In retrospect, the little Sage stickers at the Joint Meetings were just this sort of thing, though the speaker talked about Twitter, having guest posts, using animation, using lots of tags, etc. There is even a "video Rchive" out there. +++ One meta-question is how much all this applies to Sage; in some sense we have a much more limited potential user base, but in other ways we have at least as big of one and then some. What is different or the same about Sage and R from this standpoint? I hope this provides much food for thought! - kcrisman -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel
Re: [sage-devel] is this kind of license Sage-compatible?
On Wed, Jul 28, 2010 at 11:30 AM, David Joyner wrote: > On Wed, Jul 28, 2010 at 12:46 PM, William Stein wrote: >> On Wed, Jul 28, 2010 at 8:52 AM, David Joyner wrote: >>> I think this is basically a modified BSD license, which is GPL compatible. >> >> It has an additional condition that is not in the GPL: "Any >> publication resulting from research that made use of >> this software should cite this document." This might make it non-GPL >> compatible. > > > I view that as more of a request (as in "here is how to > cite DSDP...") than a legal requirement, but maybe I'm wrong. If it is a request, it's fine. If it is a legal requirement, then it definitely renders the software GPL-incompatible. If it's a legal requirement, then it is kind of similar to the "advertising must explicitly cite this component" clause of the original non-GPL-compatible BSD license. -- William > > >> >> William >> >>> >>> >>> On Wed, Jul 28, 2010 at 11:29 AM, Dima Pasechnik wrote: http://www.mcs.anl.gov/hs/software/DSDP/Copyright.txt (C) COPYRIGHT 2004 UNIVERSITY OF CHICAGO This program discloses material protectable under copyright laws of the United States. Permission to copy and modify this software and its documentation is hereby granted, provided that this notice is retained thereon and on all copies or modifications. The University of Chicago makes no representations as to the suitability and operability of this software for any purpose. It is provided "as is"; without express or implied warranty. Permission is hereby granted to use, reproduce, prepare derivative works, and to redistribute to others, so long as this original copyright notice is retained. Any publication resulting from research that made use of this software should cite this document. [ truncated - there is more stuff...] Thanks, Dima -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org >>> >>> -- >>> To post to this group, send an email to sage-devel@googlegroups.com >>> To unsubscribe from this group, send an email to >>> sage-devel+unsubscr...@googlegroups.com >>> For more options, visit this group at >>> http://groups.google.com/group/sage-devel >>> URL: http://www.sagemath.org >>> >> >> >> >> -- >> William Stein >> Professor of Mathematics >> University of Washington >> http://wstein.org >> >> -- >> To post to this group, send an email to sage-devel@googlegroups.com >> To unsubscribe from this group, send an email to >> sage-devel+unsubscr...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/sage-devel >> URL: http://www.sagemath.org >> > > -- > To post to this group, send an email to sage-devel@googlegroups.com > To unsubscribe from this group, send an email to > sage-devel+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-devel > URL: http://www.sagemath.org > -- William Stein Professor of Mathematics University of Washington http://wstein.org -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
Re: [sage-devel] Re: new keywords for limit()
On Wed, Jul 28, 2010 at 11:18 AM, ma...@mendelu.cz wrote: > > On 28 čnc, 09:39, Johannes wrote: >> > 2. I wanted to avoid confusion about whether "left" meant "moving >> > leftward" as opposed to "from the left." >> >> +1 here seems to be more presice than just left or right. >> greatz Johannes > > I wonder if the preferred way how to read the limit in some language > is something like > "limit of the function f as x moves leftward and approaches a". > > I could mistaken, but I think that "limit" and "left" allways means > limit from the left, left-hand-side limit, etc. I am not fluent in > English, but despite this fact I think there is no confusion. I have > never heard on a conferrence somethink like "x moves leftward" for > limit from the right. Does anybody have another experience? I am a native English speaker, and have never heard left or right meaning anything other than the limit *from* the left (negative) or right (positive) sides. Personally, I'd rather save the keystrokes and not have to type "from_" every time. - Robert -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Re: Two questions about sliders in interacts
On Jul 28, 6:07 pm, kcrisman wrote: > 1) Endpoint markers for the sliders. I think that was already requested some time ago, I'm not sure, and I think that's quite important. Something else I heard was to be able to change the color - i.e. to match it with the color of a plotted line. H -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
Re: [sage-devel] is this kind of license Sage-compatible?
On Wed, Jul 28, 2010 at 12:46 PM, William Stein wrote: > On Wed, Jul 28, 2010 at 8:52 AM, David Joyner wrote: >> I think this is basically a modified BSD license, which is GPL compatible. > > It has an additional condition that is not in the GPL: "Any > publication resulting from research that made use of > this software should cite this document." This might make it non-GPL > compatible. I view that as more of a request (as in "here is how to cite DSDP...") than a legal requirement, but maybe I'm wrong. > > William > >> >> >> On Wed, Jul 28, 2010 at 11:29 AM, Dima Pasechnik wrote: >>> http://www.mcs.anl.gov/hs/software/DSDP/Copyright.txt >>> >>> >>> (C) COPYRIGHT 2004 UNIVERSITY OF CHICAGO >>> >>> This program discloses material protectable under copyright laws of >>> the United States. >>> Permission to copy and modify this software and its documentation is >>> hereby granted, provided that this notice is retained thereon and on >>> all copies or >>> modifications. The University of Chicago makes no representations as >>> to the suitability >>> and operability of this software for any purpose. It is provided "as >>> is"; without >>> express or implied warranty. Permission is hereby granted to use, >>> reproduce, prepare >>> derivative works, and to redistribute to others, so long as this >>> original copyright notice >>> is retained. Any publication resulting from research that made use of >>> this software >>> should cite this document. >>> >>> [ truncated - there is more stuff...] >>> >>> Thanks, >>> Dima >>> >>> -- >>> To post to this group, send an email to sage-devel@googlegroups.com >>> To unsubscribe from this group, send an email to >>> sage-devel+unsubscr...@googlegroups.com >>> For more options, visit this group at >>> http://groups.google.com/group/sage-devel >>> URL: http://www.sagemath.org >>> >> >> -- >> To post to this group, send an email to sage-devel@googlegroups.com >> To unsubscribe from this group, send an email to >> sage-devel+unsubscr...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/sage-devel >> URL: http://www.sagemath.org >> > > > > -- > William Stein > Professor of Mathematics > University of Washington > http://wstein.org > > -- > To post to this group, send an email to sage-devel@googlegroups.com > To unsubscribe from this group, send an email to > sage-devel+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-devel > URL: http://www.sagemath.org > -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Re: new keywords for limit()
On 28 čnc, 09:39, Johannes wrote: > > 2. I wanted to avoid confusion about whether "left" meant "moving > > leftward" as opposed to "from the left." > > +1 here seems to be more presice than just left or right. > greatz Johannes I wonder if the preferred way how to read the limit in some language is something like "limit of the function f as x moves leftward and approaches a". I could mistaken, but I think that "limit" and "left" allways means limit from the left, left-hand-side limit, etc. I am not fluent in English, but despite this fact I think there is no confusion. I have never heard on a conferrence somethink like "x moves leftward" for limit from the right. Does anybody have another experience? Robert Marik -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Re: sage -clone failing with "...untrusted file/user..." message
I just saw this yesterday. I had installed Sage from source as a normal user (myself), but then began messing around while in a shell as root (oops). If I recall right, the first thing I did was hg qinit and then as a result several files had their ownership change to root and I started to see the "Not trusting..." message. When I restored a few files to the right ownership (fncache being one) all was well and the message went away. Maybe poke around in devel/sage/.hg and see who owns what? Rob On Jul 28, 5:07 am, Dima Pasechnik wrote: > Dear all, > any idea what to do with this: > > d...@sage:/scratch/dima$ sage -clone testcvxopt > Now cloning the current Sage library branch... > hg clone sage sage-testcvxopt > Not trusting file /usr/local/sage/devel/sage-main/.hg/hgrc from > untrusted user mvngu, group mvngu > abort: Permission denied: sage-testcvxopt > Error cloning > > real 0m0.091s > user 0m0.070s > sys 0m0.010s > d...@sage:/scratch/dima$ > > Thanks, > Dima -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
Re: [sage-devel] is this kind of license Sage-compatible?
On Wed, Jul 28, 2010 at 8:52 AM, David Joyner wrote: > I think this is basically a modified BSD license, which is GPL compatible. It has an additional condition that is not in the GPL: "Any publication resulting from research that made use of this software should cite this document." This might make it non-GPL compatible. William > > > On Wed, Jul 28, 2010 at 11:29 AM, Dima Pasechnik wrote: >> http://www.mcs.anl.gov/hs/software/DSDP/Copyright.txt >> >> >> (C) COPYRIGHT 2004 UNIVERSITY OF CHICAGO >> >> This program discloses material protectable under copyright laws of >> the United States. >> Permission to copy and modify this software and its documentation is >> hereby granted, provided that this notice is retained thereon and on >> all copies or >> modifications. The University of Chicago makes no representations as >> to the suitability >> and operability of this software for any purpose. It is provided "as >> is"; without >> express or implied warranty. Permission is hereby granted to use, >> reproduce, prepare >> derivative works, and to redistribute to others, so long as this >> original copyright notice >> is retained. Any publication resulting from research that made use of >> this software >> should cite this document. >> >> [ truncated - there is more stuff...] >> >> Thanks, >> Dima >> >> -- >> To post to this group, send an email to sage-devel@googlegroups.com >> To unsubscribe from this group, send an email to >> sage-devel+unsubscr...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/sage-devel >> URL: http://www.sagemath.org >> > > -- > To post to this group, send an email to sage-devel@googlegroups.com > To unsubscribe from this group, send an email to > sage-devel+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-devel > URL: http://www.sagemath.org > -- William Stein Professor of Mathematics University of Washington http://wstein.org -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Re: sage-vmware-4.4.alpha0.zip Corrupted?
On Jul 28, 12:53 pm, "Dr. David Kirkby" wrote: > There > should be better ways of handling big files on unreliable connections. I think > my splitting the file into 99 parts for you was right to solve your immediate > problem, but its not a long term solution. I just want to repeat that in my eyes, using the metalink file would solve all of this. Just look into the content of this file [1] (it's plain text XML) and you can see that the entire zip file is split into 247 parts (i.e. 4 MB each) with individual hashsums. There are clients like aria2 ([2], available for linux & windows) that can make use of that information to request these parts individually from the given list of http+ftp servers (fyi, these transfer protocols are able to handle requests for a certain part of a big file) ... then check the pieces, re-download some if necessary and after a download has finished, be even able to validate+repair a file. matalinks are also on track to be standardized as a RFC: http://tools.ietf.org/html/rfc5854 [1] http://www.sagemath.org/mirror/win/meta/sage-vmware-4.4.alpha0.zip.metalink [2] http://aria2.sourceforge.net/ I'm not aware of a better solution to handle this problem ... H -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Two questions about sliders in interacts
Hi all, Two interesting feature requests came from viewers of my talk at useR! 2010. Are either or both of these desirable? If so, I'll open tickets. 1) Endpoint markers for the sliders. Several people wanted to see what the range of the slider was while sliding, since it might be difficult to tell otherwise (0 to 1, .1 to .9, ... ). I guess the request would be to make it possible (or even default) to have the endpoints somehow labeled. 2) Stepping backwards on sliders. Currently, @interact def _(n=slider(100,0,-1,1)): print n gives the error ValueError, "invalid negative step size -- step size must be positive" as far as I know. Allowing this could be very helpful, but maybe there was a reason not to do this I am unaware of - the explicit ValueError leads me to think so, since whoever wrote it put knew this could happen! Okay, thanks for any feedback. - kcrisman -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Adding dictionaries pointwise using cython
Salut cython specialists,
I would like to implement a routine adding dictionaries with possibly
different keys pointwise and delete all zero entries in the end:
sage: def dict_sum( list_of_dics, remove_zeros=True ):
... return_dict = {}
... for D in list_of_dics:
... for key in D:
... if key in return_dict:
... return_dict[ key ] += D[ key ]
... else:
... return_dict[ key ] = D[ key ]
...
... if remove_zeros:
... return_dict = dict( [ (key,value) for key,value in
d.iteritems() if value != 0 ] )
... return return_dict
sage: d = dict(zip(range(10),range(0,10,2)))
sage: timeit("p = dict_sum([d]*10, True)")
sage: timeit("p = dict_sum([d]*10, False)")
5 loops, best of 3: 216 ms per loop
5 loops, best of 3: 138 ms per loop
Improving it a little and putting it into cython gives
sage: %cython
sage: def dict_sum_cython( list_of_dicts, remove_zeros=True ):
... return_dict = list_of_dicts[0].copy()
... for D in list_of_dicts[1:]:
... for key in D:
... if key in return_dict:
... return_dict[key] += D[key]
... else:
... return_dict[key] = D[key]
...
... if remove_zeros:
... for_removal = [key for (key,value) in
return_dict.iteritems() if not value]
... for key in for_removal:
... del return_dict[key]
... return return_dict
sage: timeit("p = dict_sum_cython([d]*10, True)")
sage: timeit("p = dict_sum_cython([d]*10, False)")
5 loops, best of 3: 56 ms per loop
5 loops, best of 3: 57.8 ms per loop
This is already much faster! Any ideas how to improve the speed now?
All I know about the variables is that all dict values live in a
common ring ( mostly QQ ), can I use this somehow?
Thanks for your help, Christian
--
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Re: [sage-devel] is this kind of license Sage-compatible?
I think this is basically a modified BSD license, which is GPL compatible. On Wed, Jul 28, 2010 at 11:29 AM, Dima Pasechnik wrote: > http://www.mcs.anl.gov/hs/software/DSDP/Copyright.txt > > > (C) COPYRIGHT 2004 UNIVERSITY OF CHICAGO > > This program discloses material protectable under copyright laws of > the United States. > Permission to copy and modify this software and its documentation is > hereby granted, provided that this notice is retained thereon and on > all copies or > modifications. The University of Chicago makes no representations as > to the suitability > and operability of this software for any purpose. It is provided "as > is"; without > express or implied warranty. Permission is hereby granted to use, > reproduce, prepare > derivative works, and to redistribute to others, so long as this > original copyright notice > is retained. Any publication resulting from research that made use of > this software > should cite this document. > > [ truncated - there is more stuff...] > > Thanks, > Dima > > -- > To post to this group, send an email to sage-devel@googlegroups.com > To unsubscribe from this group, send an email to > sage-devel+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-devel > URL: http://www.sagemath.org > -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] is this kind of license Sage-compatible?
http://www.mcs.anl.gov/hs/software/DSDP/Copyright.txt (C) COPYRIGHT 2004 UNIVERSITY OF CHICAGO This program discloses material protectable under copyright laws of the United States. Permission to copy and modify this software and its documentation is hereby granted, provided that this notice is retained thereon and on all copies or modifications. The University of Chicago makes no representations as to the suitability and operability of this software for any purpose. It is provided "as is"; without express or implied warranty. Permission is hereby granted to use, reproduce, prepare derivative works, and to redistribute to others, so long as this original copyright notice is retained. Any publication resulting from research that made use of this software should cite this document. [ truncated - there is more stuff...] Thanks, Dima -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] undeclared name not builtin: gap
while loading an .spyx file in Sage, which uses gap() and gap.eval(), I get " undeclared name not builtin: gap" Is it a bug or a feature? Thanks, Dima -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] sage -clone failing with "...untrusted file/user..." message
Dear all, any idea what to do with this: d...@sage:/scratch/dima$ sage -clone testcvxopt Now cloning the current Sage library branch... hg clone sage sage-testcvxopt Not trusting file /usr/local/sage/devel/sage-main/.hg/hgrc from untrusted user mvngu, group mvngu abort: Permission denied: sage-testcvxopt Error cloning real0m0.091s user0m0.070s sys 0m0.010s d...@sage:/scratch/dima$ Thanks, Dima -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
Re: [sage-devel] Re: Should the date and time of test failures be noted?
On 07/28/10 12:00 PM, koffie wrote: Hej David, If you think that RAM exaustion is going to cause problems, why don't you also add the recording of the memory useage in the doctesting (I wouldn't now how to exactly do this but I guess you could use the output of command line utilities such as top, vmstat/vm_stat or free). If this would make the output of "sage -t" to long for the average user/debugger you could always make a verbose and/or memory option to the doctesting which could be used by running "sage -tv" or "sage -tm" or or something alike. I hope you find these ideas usefull. Kind Rigards, Maarten Derickx I believe any number of problems on the system could cause build or doctests failures. I think it would just be easier to record the time. There is a plan to create a script which would aid debugging by collecting system information http://trac.sagemath.org/sage_trac/ticket/8048 but I would not suggest printing that out each time there's a doctest failure. I had a build fail on t2.math. When I look in the system logs I see Jul 25 16:11:07 t2 tmpfs: [ID 518458 kern.warning] WARNING: /tmp: File system full, swap space limit exceeded Jul 25 16:11:07 t2 last message repeated 25 times Had that been a doctest failure, it would have been useful to know the time of the failure. If it was around 16:11:07 on 25th July, I would have suspected that as a problem. Getting the date is probably trivial and can be put on one line. Getting information about all possible problems on all platforms would be a lot more difficult. It''s not only RAM. For examples I see NFS related errors Jul 26 19:41:59 t2 nfs: [ID 220977 kern.info] NOTICE: [NFS4][Server: disk][Mntpt: /home]NFS op OP_CLOSE got error 4 causing recovery action NR_LOST_STATE_RQST. Jul 26 19:41:59 t2 nfs: [ID 814820 kern.info] NOTICE: [NFS4][Server: disk][Mntpt: /home]Lost OP_CLOSE request for fs /home, file ./mpatel/.sage/temp/t2/20720/qsieve_0/tmp2.1117.21848 Had mpatel's build failed there, we could have suspected that as a problem. There are lots of people working on improving the doctest framework. If there was a consensus to record the date/time of any failures, I would suggest adding it, but so far nobody has really felt it is worthwhile other than me! I would suggest having something like: sage -t -long devel/sage/sage/geometry/cone.py ** File "/rootpool2/local/kirkby/sage-4.5.2.alpha0-9343/devel/sage-main/sage/geometry/cone.py", line 559: sage: c = Cone([(1,0), (0,1)]) Expected: 4372618627376133801 Got nothing ** 1 items had failures: 1 of 3 in __main__.example_7 ***Test Failed*** 1 failures. For whitespace errors, see the file /rootpool2/local/kirkby/.sage//tmp/.doctest_cone.py [66.6 s at Wed Jul 28 07:38:15 EDT 2010] I also think it would be useful to add the hostname and operating system somewhere in the log file use for testing, though that only needs doing once, not on every line. -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Re: Should the date and time of test failures be noted?
Hej David, If you think that RAM exaustion is going to cause problems, why don't you also add the recording of the memory useage in the doctesting (I wouldn't now how to exactly do this but I guess you could use the output of command line utilities such as top, vmstat/vm_stat or free). If this would make the output of "sage -t" to long for the average user/debugger you could always make a verbose and/or memory option to the doctesting which could be used by running "sage -tv" or "sage -tm" or or something alike. I hope you find these ideas usefull. Kind Rigards, Maarten Derickx PS. and Dutch saying which I got from my father says: "Meet 't en je weet 't" wich translates to "Measure it and you know it". I think this saying also applies in this situation ;). On Jul 28, 12:13 am, David Kirkby wrote: > On 27 July 2010 22:10, Jeroen Demeyer wrote: > > > > > > > On 2010-07-27 21:25, David Kirkby wrote: > >> Currently if a test fails in the doctest, one can never be sure if the > >> machine may have run out of swap space, disk space disk I/O problems > >> or all manner of other things that could cause test failures. But if > >> the time of the failure was recorded, then the system logs could be > >> used to see if anything was wrong at the time of the failure. > > > I have no problem with your proposal, but I don't see how it will solve > > your problem. I doubt that "2+2" is going to return "5" simply because > > of problems with the system. You probably get some exception saying > > that you're out of memory or that the test crashed or whatever. And > > manually checking the error looks easier than manually checking the time > > of the failure. Or am I missing something? > > > Jeroen. > > There have been reports of doc tests failing on sage.math when all RAM > has been exhausted. I've seen it on t2 too, where the machine has run > out of swap space. I think the issue of RAM exhaustion is getting > worst now its possible to build lots of packages in parallel. I > believe William implemented some limits on sage.math because of lack > of resources. > > There are very often doc tests which fail when one runs > > make ptestlong > > but pass when one runs the test on the command line. I have sometimes > suspected that it might be a lack of system resources. > > Does anyone else have any comments? > > Dave -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
Re: [sage-devel] sage-vmware-4.4.alpha0.zip Corrupted?
On 07/27/10 07:18 PM, Sazzad wrote: Big Thanks! You can post this link : http://boxen.math.washington.edu/home/kirkby/vmware/ in the sage main download page. so those who are interested could take benefit. best wishes I don't think posting my parts at http://boxen.math.washington.edu/home/kirkby/vmware/ is such a good idea. There should be better ways of handling big files on unreliable connections. I think my splitting the file into 99 parts for you was right to solve your immediate problem, but its not a long term solution. Dave -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
Re: [sage-devel] help with a failing doctest in symbolics (#9582)
On Wed, 28 Jul 2010 15:50:01 +0900 Dan Drake wrote: > For those of you that don't follow sage-release, there's only one > ticket that's really holding up 4.5.2: #9582. There are some tests in > symbolics that fail on OS X because the terms are printed in a > different order. I don't know how to fix this, but I'll bet one of > you does! I just sent a reply to sage-release, but here it is again. I'm at the ISSAC conference in Munich and will get back late tonight. I can take a look at this tomorrow, if no one beats me to it. I am not sure if this is something related to pynac in any case. There were no changes related to comparisons in pynac. Cheers, Burcin -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
Re: [sage-devel] Re: Wrong symbolic sum
On Tue, 27 Jul 2010 18:29:27 -0700 (PDT) Henryk Trappmann wrote: > On Jul 28, 2:21 am, kcrisman wrote: > > On Jul 27, 1:17 am, Henryk Trappmann > > wrote: > > > sage: sum(binomial(n,k)*binomial(k-1,j)*(-1)**(k-1-j),k,j+1,n) > > In fact, the answer appears to always be 1 or 0. Is that true? > > Yes, its 1 for n>=j+1 and (of course) 0 for n > I discovered another small issue with the binomial: > sage: binomial(0.5r,5) > --- > AttributeErrorTraceback (most recent call > last) > > /home/bo198214/projects/ in () > > /opt/sage-4.5-linux-32bit-ubuntu_10.04_lts-i686-Linux/local/lib/ > python2.6/site-packages/sage/rings/arith.pyc in binomial(x, m) >2887 if isinstance(x, (float, sage.rings.real_mpfr.RealNumber, >2888 sage.rings.real_mpfr.RealLiteral)): > -> 2889 P = x.parent() >2890 if m < 0: >2891 return P(0) > > AttributeError: 'float' object has no attribute 'parent' Can you open a ticket about these problems with the binomial (including the "either m or x-m must be an integer" error mentioned in kcrisman's message? The bug in maxima for the evaluation of the sum should also be a separate ticket. Thank you. Burcin -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
Re: [sage-devel] Re: new keywords for limit()
Hi Dana, On Tue, 27 Jul 2010 12:23:28 -0700 (PDT) "D.C. Ernst" wrote: > > > I suggest we add "left" and "right" (instead of "from_left" and > > > "from_right"). In addition, deprecate "above" and "below". > > > > +1 from me. I think that would be a big improvement. > > I'm assuming that you want to replace "from_left" (respectively, > "from_right") with "left" (respectively, "right"). There are two > reasons why I elected to go with "from_*": > > 1. This is more akin to the language that students use when learning > one-sided limits. > 2. I wanted to avoid confusion about whether "left" meant "moving > leftward" as opposed to "from the left." There is no tab completion for these arguments, I don't think they'll be used if we leave them as "from_*" > I'm not particularly in love with "from_*" and I am certainly > agreeable to changing it (as suggested earlier or otherwise). Can we > use the symbols "+" and "-"? This most closed mimics the standard > notation and is concise. Thoughts? I like these better than "left" and "right", especially since we already support "plus" and "minus." Thank you. Burcin -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
Re: [sage-devel] Re: new keywords for limit()
> 2. I wanted to avoid confusion about whether "left" meant "moving > leftward" as opposed to "from the left." > +1 here seems to be more presice than just left or right. greatz Johannes -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
