[sage-support] Re: Longest Common Subsequence
Now waiting for a review ! http://trac.sagemath.org/ticket/14969 Nathann On 17 July 2013 12:29, Nathann Cohen nathann.co...@gmail.com wrote: Helloo everybody !!! Is there a way to compute the longest common subsequence of two (binary) words in Sage ? I can't find how, but it looks like something Sage should be able to do :-) Thaanks ! Nathann -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/groups/opt_out.
[sage-support] Integration of formal functions
In the latest version of sage (at least what cloud.sagemath.org is
running), there is a problem with substituting constants into the formal
integrals of formal functions. See the examples below.
Victor
sage: var('a'); function('f',a)
sage: g = f(a).integrate(a,0,a^2)
sage: g
integrate(f(a),0,a^2)
sage: g.derivative(a)
Error in lines 1-1
Traceback (most recent call last):
File /mnt/home/lQoU8m2s/.sagemathcloud/sage_server.py, line 498, in execute
exec compile(block+'\n', '', 'single') in namespace, locals
File , line 1, in module
File expression.pyx, line 3006, in
sage.symbolic.expression.Expression.derivative
(sage/symbolic/expression.cpp:15855)
File derivative.pyx, line 216, in sage.misc.derivative.multi_derivative
(sage/misc/derivative.c:2715)
File expression.pyx, line 3078, in
sage.symbolic.expression.Expression._derivative
(sage/symbolic/expression.cpp:16245)
File
/usr/local/sage/sage-5.10.rc1/local/lib/python2.7/site-packages/sage/symbolic/integration/integral.py,
line 224, in _tderivative_
- f.subs(x==a)*a.diff(diff_param)
File element.pyx, line 344, in sage.structure.element.Element.__getattr__
(sage/structure/element.c:3871)
File misc.pyx, line 257, in sage.structure.misc.getattr_from_other_class
(sage/structure/misc.c:1696)
AttributeError: 'sage.rings.integer.Integer' object has no attribute 'diff'
sage: g1 = f(a).integrate(a)
sage: g1(0)
Error in lines 1-1
Traceback (most recent call last):
File /mnt/home/lQoU8m2s/.sagemathcloud/sage_server.py, line 498, in execute
exec compile(block+'\n', '', 'single') in namespace, locals
File , line 1, in module
File expression.pyx, line 3973, in
sage.symbolic.expression.Expression.__call__
(sage/symbolic/expression.cpp:19900)
File ring.pyx, line 685, in sage.symbolic.ring.SymbolicRing._call_element_
(sage/symbolic/ring.cpp:7672)
File expression.pyx, line 3824, in
sage.symbolic.expression.Expression.substitute
(sage/symbolic/expression.cpp:19177)
File
/usr/local/sage/sage-5.10.rc1/local/lib/python2.7/site-packages/sage/symbolic/integration/integral.py,
line 75, in _eval_
if len(x.variables()) == 1:
File element.pyx, line 344, in sage.structure.element.Element.__getattr__
(sage/structure/element.c:3871)
File misc.pyx, line 257, in sage.structure.misc.getattr_from_other_class
(sage/structure/misc.c:1696)
AttributeError: 'sage.rings.integer.Integer' object has no attribute 'variables'
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[sage-support] legends for 3d graphics
I am using Sage to plot an arrangement of planes in 3-space. Each plane has its own color, and I would like a legend in the plot that associates the equation of each plane with its color. This experiment seems to indicate that legends are not available for 3d graphics: --- sage: p = plot3d(x^2,(x,-1,1),(y,-1,1),legend_label='0') sage: q = plot3d(x^2+y^2,(x,-1,1),(y,-1,1),legend_label='1') sage: c = p+q sage: c.legend(true) --- AttributeErrorTraceback (most recent call last) ipython-input-28-744abb0d6c3b in module() 1 c.legend(true) AttributeError: 'Graphics3dGroup' object has no attribute 'legend' --- As I rotate the 3d-object, I would like for the legend would stay in one place. Any suggestions? Thanks. -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/groups/opt_out.
Re: [sage-support] legends for 3d graphics
On Thu, Jul 25, 2013 at 9:16 AM, davidp davide...@gmail.com wrote: I am using Sage to plot an arrangement of planes in 3-space. Each plane has its own color, and I would like a legend in the plot that associates the equation of each plane with its color. This experiment seems to indicate that legends are not available for 3d graphics: --- sage: p = plot3d(x^2,(x,-1,1),(y,-1,1),legend_label='0') sage: q = plot3d(x^2+y^2,(x,-1,1),(y,-1,1),legend_label='1') sage: c = p+q sage: c.legend(true) --- AttributeErrorTraceback (most recent call last) ipython-input-28-744abb0d6c3b in module() 1 c.legend(true) AttributeError: 'Graphics3dGroup' object has no attribute 'legend' --- As I rotate the 3d-object, I would like for the legend would stay in one place. Any suggestions? This won't help you today, but an REU student -- Renford Alexander -- is working fulltime right now on Three.js-based 3d graphics rendering for https://cloud.sagemath.com. He showed me some demos yesterday of drawing text in 3d, the looked pretty useful. In particular, he draws arbitrary text on a 2d html5 canvas, then puts the canvas element in the 3d scenes as a sprite.This functionality should come to https://cloud.sagemath.com within a month, hopefully. -- William Thanks. -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/groups/opt_out. -- William Stein Professor of Mathematics University of Washington http://wstein.org -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/groups/opt_out.
Re: [sage-support] Integration of formal functions
On Thu, Jul 25, 2013 at 9:16 AM, Victor Miller victorsmil...@gmail.com wrote:
In the latest version of sage (at least what cloud.sagemath.org is running),
... which is sage-5.10, the latest released version. However, the
same happens with 'Sage Version 5.11.beta2, Release Date: 2013-06-19'.
there is a problem with substituting constants into the formal integrals of
formal functions. See the examples below.
Victor
sage: var('a'); function('f',a)
sage: g = f(a).integrate(a,0,a^2)
sage: g
integrate(f(a),0,a^2)
sage: g.derivative(a)
Error in lines 1-1
Traceback (most recent call last):
File /mnt/home/lQoU8m2s/.sagemathcloud/sage_server.py, line 498, in
execute
exec compile(block+'\n', '', 'single') in namespace, locals
File , line 1, in module
File expression.pyx, line 3006, in
sage.symbolic.expression.Expression.derivative
(sage/symbolic/expression.cpp:15855)
File derivative.pyx, line 216, in sage.misc.derivative.multi_derivative
(sage/misc/derivative.c:2715)
File expression.pyx, line 3078, in
sage.symbolic.expression.Expression._derivative
(sage/symbolic/expression.cpp:16245)
File
/usr/local/sage/sage-5.10.rc1/local/lib/python2.7/site-packages/sage/symbolic/integration/integral.py,
line 224, in _tderivative_
- f.subs(x==a)*a.diff(diff_param)
File element.pyx, line 344, in
sage.structure.element.Element.__getattr__ (sage/structure/element.c:3871)
File misc.pyx, line 257, in sage.structure.misc.getattr_from_other_class
(sage/structure/misc.c:1696)
AttributeError: 'sage.rings.integer.Integer' object has no attribute 'diff'
sage: g1 = f(a).integrate(a)
sage: g1(0)
Error in lines 1-1
Traceback (most recent call last):
File /mnt/home/lQoU8m2s/.sagemathcloud/sage_server.py, line 498, in
execute
exec compile(block+'\n', '', 'single') in namespace, locals
File , line 1, in module
File expression.pyx, line 3973, in
sage.symbolic.expression.Expression.__call__
(sage/symbolic/expression.cpp:19900)
File ring.pyx, line 685, in
sage.symbolic.ring.SymbolicRing._call_element_ (sage/symbolic/ring.cpp:7672)
File expression.pyx, line 3824, in
sage.symbolic.expression.Expression.substitute
(sage/symbolic/expression.cpp:19177)
File
/usr/local/sage/sage-5.10.rc1/local/lib/python2.7/site-packages/sage/symbolic/integration/integral.py,
line 75, in _eval_
if len(x.variables()) == 1:
File element.pyx, line 344, in
sage.structure.element.Element.__getattr__ (sage/structure/element.c:3871)
File misc.pyx, line 257, in sage.structure.misc.getattr_from_other_class
(sage/structure/misc.c:1696)
AttributeError: 'sage.rings.integer.Integer' object has no attribute
'variables'
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--
William Stein
Professor of Mathematics
University of Washington
http://wstein.org
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Re: [sage-support] legends for 3d graphics
Cool! On Thursday, July 25, 2013 10:58:56 AM UTC-7, William wrote: On Thu, Jul 25, 2013 at 9:16 AM, davidp davi...@gmail.com javascript: wrote: I am using Sage to plot an arrangement of planes in 3-space. Each plane has its own color, and I would like a legend in the plot that associates the equation of each plane with its color. This experiment seems to indicate that legends are not available for 3d graphics: --- sage: p = plot3d(x^2,(x,-1,1),(y,-1,1),legend_label='0') sage: q = plot3d(x^2+y^2,(x,-1,1),(y,-1,1),legend_label='1') sage: c = p+q sage: c.legend(true) --- AttributeErrorTraceback (most recent call last) ipython-input-28-744abb0d6c3b in module() 1 c.legend(true) AttributeError: 'Graphics3dGroup' object has no attribute 'legend' --- As I rotate the 3d-object, I would like for the legend would stay in one place. Any suggestions? This won't help you today, but an REU student -- Renford Alexander -- is working fulltime right now on Three.js-based 3d graphics rendering for https://cloud.sagemath.com. He showed me some demos yesterday of drawing text in 3d, the looked pretty useful. In particular, he draws arbitrary text on a 2d html5 canvas, then puts the canvas element in the 3d scenes as a sprite.This functionality should come to https://cloud.sagemath.com within a month, hopefully. -- William Thanks. -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support...@googlegroups.com javascript:. To post to this group, send email to sage-s...@googlegroups.comjavascript:. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/groups/opt_out. -- William Stein Professor of Mathematics University of Washington http://wstein.org -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/groups/opt_out.
[sage-support] 3d graphics display problem
In the following, I expect p+s to be a picture of a plane with the word
'hello' embedded at its center. Instead, I get the word 'hello' in the
corner of the frame (where the number -1) might be expected. Further, it
prints a number 2 way outside of the frame, and the axes labels are all in
the wrong order. It is as if there is an off-by-one error in some labeling
code somewhere. When I print p+s+t, I get 'hello' embedded in the center
as expected, and 'goodbye' is shifted to the corner of the frame now.
---
sage: var('x y')
(x, y)
sage: p = plot3d(1,(x,-1,1),(y,-1,1))
sage: s = text3d('hello',(0,0,1)) # hello appears in the wrong place
sage: p + s
sage: t = text3d('goodbye',(0,0,1)) # same coordinates as s
sage: p + s + t # hello now appears in the right place, but goodbye does
not
I am running sage-5.10 under Ubuntu 13.04 on a laptop. The *same* setup on
my desktop does not produce this error. I tried re-installing sage,
removing my old .sage, .jmol, and .java directories. Same problem.
Further, when I try the same code after logging in as guest on my laptop,
the code runs with no problem. Any suggestions would be appreciated.
Thanks.
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