[sage-support] Re: pni and Sage 4.7
Thanks for the help. I was trying to avoid building Sage from source as I am not all that Linux-literate, but I did try the current source and it compiled and ran OK except for not creating .html files as 'makefile' v4.7 or later is needed to make HTML docs but missing on your system Apparently this is a known lack in Ubuntu which can easily be fixed but maybe should be added to the list of assumptions for an installation from source. Tony On Sep 2, 6:07 pm, William Stein wrote: > On Fri, Sep 2, 2011 at 10:00 AM, Maarten Derickx > > wrote: > > From the location of your sage install > > ~/Documents/sage-4.7.1-linux-32bit-ubuntu_10.04_lts- > > i686-Linux > > > I see you downloaded a prebuild binairy, I guess what's going wrong is that > > this binary was compiled in such a way that it's not compatible with your > > system. This > > post https://groups.google.com/forum/#!topic/sage-support/XJS-3u5z7ws > > might be of help. > > I don't know if we have old prebuild binary's publically available > > somewhere, > > That won't help. > > > but at least we have old source code > > on http://www.sagemath.org/src-old/ > > And current source code: > > http://www.sagemath.org/download-source.html > > -- William > > > > > -- > > To post to this group, send email to sage-support@googlegroups.com > > To unsubscribe from this group, send email to > > sage-support+unsubscr...@googlegroups.com > > For more options, visit this group at > >http://groups.google.com/group/sage-support > > URL:http://www.sagemath.org > > -- > William Stein > Professor of Mathematics > University of Washingtonhttp://wstein.org -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: setting default option values in show
Dear Ken,
One thing you could do is just to modify your Sage installation. In
the code for Posets, there is
def plot(self, label_elements=True, element_labels=None,
label_font_size=12,label_font_color='black',
vertex_size=300, vertex_colors=None,**kwds):
"""
Returns a Graphic object corresponding the Hasse diagram of
the
poset. Optionally, it is labelled.
1) Change the None for vertex_colors to your preference ('orange' or
something else)
2) In the command line, run `./sage -b` from the directory Sage lives
in
3) Start Sage however you usually do
That should work.
For many plot things there are also dictionaries you can set with
options like this, but it doesn't look like this is the case for graph
plots. There is a dictionary *listing* the options! But it doesn't
seem to come with a global dictionary one could modify once and for
all of defaults.
If that's not the case, I hope someone will correct me!
Good luck.
- kcrisman
On Sep 4, 1:05 pm, Ken Levasseur wrote:
> I'm displaying a bunch of posets and prefer the vertices to be orange as
> opposed to the default blue. The code below works fine, but I'd like to
> avoid including the option specification by setting the option for vertex
> colors to be 'orange' and I can't find exactly how to do this. Any help?
>
> example=Poset({0:[2],1:[2],2:[3],3:[]})
> example.show(vertex_colors='orange')
>
> Ken Levasseur
> UMass Lowellhttp://faculty.uml.edu/klevasseur/ads2
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[sage-support] Does Sage do quotas or other protections in case users's calculation takes too long?
Does Sage do quotas or other protections in case users's calculation takes too long? I'm having nightmares of students crashing Sage servers or tying them up with simple little commands like so... 2^(2^(2^123456789)) and def f(x): while True: pass f(x) cs -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] How get last login time of a Sage notebook user?
How get last login time of a Sage notebook user? cs -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] RSK algorithm
Could someone be kind enough to point me in the right direction to polish and submit a new sage function? SAGE already has an implementation of the Robinson-Schensted algorithm for permutations (bijection between permutations and standard Young tableaux), which I used as a base to implement the Robinson-Schensted-Knuth generalization (bijection between nonegative integer matrices and pairs of semistandard Young tableaux). Unfortunately, I don't know how to "add it" to the base Matrix class (like RS is a method from Permutation class, and I don't know if it should be desirable since it can't be applied to arbitrary matrices) nor how or where submit it for consideration. Anyway, here's the code if someone finds it useful from itertools import izip from bisect import bisect def RSK(M): """ Implementation of the Robinson-Schensted-Knuth algorithm for non negative integer matrices, based on the Robinson-Schensted algorithm for Permutations """ # M is the matrix corresponding to the pair of tableau (P,Q) # First we create the double-row array upperrow = [] lowerrow = [] for r in range(M.nrows()): fila = M[r] for c in range(len(fila)): for k in range(M[r][c]): upperrow.append(r+1) lowerrow.append(c+1) p = [] #the "insertion" tableau q = [] #the "recording" tableau # We proceed to do bumping algorithm on lower row # and recording places on upper row for a,b in izip(upperrow, lowerrow): for r,qr in izip(p,q): if r[-1] > b: y_pos = bisect(r,b) b, r[y_pos] = r[y_pos], b else: break else: r=[]; p.append(r) qr = []; q.append(qr) r.append(b) qr.append(a) return [Tableau(p), Tableau(q)] Usage: M = Matrix( [[1,0,2],[0,2,0],[1,1,0]] ) (P,Q)=RSK(Me) (P,Q) : ([[1, 1, 2, 2], [2, 3], [3]], [[1, 1, 1, 3], [2, 2], [3]]) P.pp() 1 1 2 2 2 3 3 Q.pp() 1 1 1 3 2 2 3 -- Pedro Sánchez http://drini.mx @combinatorica -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: setting default option values in show
On Sep 5, 9:00 am, kcrisman wrote: > For many plot things there are also dictionaries you can set with > options like this, but it doesn't look like this is the case for graph > plots. There is a dictionary *listing* the options! But it doesn't > seem to come with a global dictionary one could modify once and for > all of defaults. Thanks, but something like a dictionary of options is what I was looking for. I have some material to distribute to students and modifying the installation doesn't work in my case, although I'll probably do it for my own use. Ken -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Re: setting default option values in show
On Mon, Sep 5, 2011 at 12:06 PM, Ken Levasseur wrote: > > > On Sep 5, 9:00 am, kcrisman wrote: >> For many plot things there are also dictionaries you can set with >> options like this, but it doesn't look like this is the case for graph >> plots. There is a dictionary *listing* the options! But it doesn't >> seem to come with a global dictionary one could modify once and for >> all of defaults. > > Thanks, but something like a dictionary of options is what I was > looking for. I have some material to distribute to students and > modifying the installation doesn't work in my case, although I'll > probably do it for my own use. You could also just define your own wrapper for the show command, i.e., your own function called "show" (or even "sh"), and set additional options there. Check out the *args and **kwds support in Python. -- William -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: setting default option values in show
On Sep 5, 2:03 pm, William Stein wrote:
> You could also just define your own wrapper for the show command,
> i.e., your own function called "show" (or even "sh"), and set
> additional options there. Check out the *args and **kwds support in
> Python.
Wrapping is probably the cleanest and most advisable options. However,
Python's extremely dynamic nature actually makes it possible to change
the defaults on the fly. Tricks like this should probably void any
warranty, if you had any to begin with:
sage: V=Poset({Integer(0):[Integer(2)],Integer(1):
[Integer(2)],Integer(2):[Integer(3)],Integer(3):[]})
sage: L=list(V.show.im_func.func_defaults)
sage: L[5]='orange'
sage: V.show.im_func.func_defaults=tuple(L)
After this you basically have accomplished the same thing that a
source change would do -- but only for the remainder of this session.
If you now do "V.show()" you'll have orange vertices (the 5 comes from
the fact that 'vertex_color' is the 6th keyword argument in the
definition of V.show).
Again, I don't think you'd want to advertise a technique like this to
students, so go with the wrapper.
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Re: [sage-support] RSK algorithm
On Mon, 05 Sep 2011 at 09:59AM -0500, Pedro Sanchez wrote: > Could someone be kind enough to point me in the right direction to > polish and submit a new sage function? > > SAGE already has an implementation of the Robinson-Schensted algorithm > for permutations (bijection between permutations and standard Young > tableaux), which I used as a base to implement the > Robinson-Schensted-Knuth generalization (bijection between nonegative > integer matrices and pairs of semistandard Young tableaux). > > Unfortunately, I don't know how to "add it" to the base Matrix class > (like RS is a method from Permutation class, and I don't know if it > should be desirable since it can't be applied to arbitrary matrices) > nor how or where submit it for consideration. You should definitely post this to the sage-combinat list: https://groups.google.com/forum/#!forum/sage-combinat-devel (I see someone has already forwarded your message there.) The folks there are working on tableaux and would know where best to put your code. Having the bijection for nonnegative integer matrices would surely be nice to have in Sage. Dan -- --- Dan Drake - http://mathsci.kaist.ac.kr/~drake --- signature.asc Description: Digital signature
