[sage-support] Any way to organize notebooks in folders?
I am starting to collect lots of sage notebooks and I was wondering if is there any way to store the in different directories. Thanks a lot in advance. Jose -- 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] Any way to organize notebooks in folders?
Hi Jose, On Sun, Dec 12, 2010 at 11:38 PM, Nin n...@neurohost.org wrote: I am starting to collect lots of sage notebooks and I was wondering if is there any way to store the in different directories. Short answer: no. Long answer: http://groups.google.com/group/sage-notebook/browse_thread/thread/d9ca4981b2214e94 -- Regards Minh Van Nguyen -- 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] New Magma Calculator Interface - magma_free() needs update
12.12.2010 02:31, Ugur пишет:
As the layout of Magma's website have changed, the code for
magma_free() should be updated. Just want to bring to your attention.
I have edit file according new redesign of Magma's website
Sage-4.6.3/local/lib/python2.6/site-packages/sage/interfaces/magma_free.py
In atachment there is result.
It work for example as in documentation:
print magma_free(Factorization(9290348092384))
[ 2, 5, 290323377887, 1 ]
I don't understand Magma and can't know more difucult examples, so it
must be verified !!!
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#*
# Copyright (C) 2007 William Stein wst...@gmail.com
#
# Distributed under the terms of the GNU General Public License (GPL)
#
#This code is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
#General Public License for more details.
#
# The full text of the GPL is available at:
#
# http://www.gnu.org/licenses/
#*
class MagmaExpr(str):
def __repr__(self):
return str(self)
def magma_free_eval(code, strip=True, columns=0):
Use the free online MAGMA calculator to evaluate the given
input code and return the answer as a string.
LIMITATIONS: The code must evaluate in at most 20 seconds
and there is a limitation on the amount of RAM.
EXAMPLES:
sage: magma_free(Factorization(9290348092384)) # optional - internet
[ 2, 5, 290323377887, 1 ]
import urllib, httplib
server = magma.maths.usyd.edu.au
processPath = /calc/process.xml
refererPath = /calc/
refererUrl = http://%s%s; % ( server, refererPath)
code = SetColumns(%s);\n%columns + code
params = urllib.urlencode({'input':code})
headers = {Content-type: application/x-www-form-urlencoded, Accept:Accept: text/html, application/xml, application/xhtml+xml, Referer: refererUrl}
conn = httplib.HTTPConnection(server)
conn.request(POST, processPath, params, headers)
response = conn.getresponse()
results = response.read()
conn.close()
# Result form is:
# ?xml version=1.0?
# calculator
# headers
# max_time60/max_time
# seed341657781/seed
# version2.17-1/version
# time0.320/time
# memory9.53MB/memory
#/headers
#results
#line[ lt;2, 5gt;, lt;290323377887, 1gt; ]/line
#/results
# /calculator
# results = ?xml version=1.0?calculatorheadersmax_time60/max_timeseed341657781/seedversion2.17-1/versiontime0.320/timememory9.53MB/memory/headersresultsline[ lt;2, 5gt;, lt;290323377887, 1gt; ]/line/results/calculator
from xml.dom.minidom import parseString
xmlDoc = parseString(results)
res = None
# oHeaders = doc.getElementsByTagName('headers') # for version and timing
reslutsNodeList = xmlDoc.getElementsByTagName('results')
if len(reslutsNodeList) 0:
reslutsNode = reslutsNodeList[0]
lines = reslutsNode.getElementsByTagName('line')
if len(reslutsNodeList) 0:
for line in lines:
textNode = line.childNodes[0]
res = textNode.data
# res is unicode string: u'[ 2, 5, 290323377887, 1 ]
class MagmaExpr(str):
def __repr__(self):
return str(self)
return MagmaExpr(res)
class MagmaFree:
Evaluate MAGMA code without requiring that MAGMA be installed
on your computer by using the free online MAGMA calculator.
EXAMPLES:
sage: magma_free(Factorization(9290348092384)) # optional - internet
[ 2, 5, 290323377887, 1 ]
def eval(self, x, **kwds):
return magma_free_eval(x)
def __call__(self, code, strip=True, columns=0):
return magma_free_eval(code, strip=strip, columns=columns)
magma_free = MagmaFree()
[sage-support] Installing SAGE alongside existing Python installation
Hello everybody, I am a Spanish aerospace engineering student and I use SAGE every day to do my homework. It is amazing that such a piece of software exists free of charge and freely distributed. I know that SAGE is self-contained, but I wanted to know if it's possible to install it in a way that it uses, for example, my existing Pyhton installation (Linux user here). If I could do that I could save lots of disk space. Is there any way to accomplish what I'm asking? I do not fear the shell or source code. Regards, Juan Luis Cano -- 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: Installing SAGE alongside existing Python installation
On Sunday, December 12, 2010 3:49:33 PM UTC+1, Juanlu_001 wrote:Is there any way to accomplish what I'm asking? I do not fear the shell or source code. It's possible and done for some linux distributions, but I don't think it's a good idea for you. You can look into Sage's local/lib/python2.6 folder, where you can see that you can only save about 40MB (all the rest is in the site packages which are part of sage anyways). Also, Sage is only tested to work well with the given python version. That might not be true for other ones, because some libs directly access python internal datastructures that might be subject to changes and so on. Rather, you could go the other way round and use sage -python as your python interpreter or work inside the Sage Environment via $ sage -sh ... depending on what you want to accomplish. H -- 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: New Magma Calculator Interface - magma_free() needs update
Hey thanks for the new code. But unfortunately, if I understood
correctly, the new code just takes the last line of the output :
( E.g., compare results of magma_free('[[a,b,c]:a,b,c in [1..20] |
a^2+b^2 eq c^2 and a le b];') both in Sage and in Magma-Calc. There
might be another problem, but for the time being, I can report this
problem.
On Dec 12, 3:10 am, Alexey U. Gudchenko p...@goodok.ru wrote:
12.12.2010 02:31, Ugur пишет:
As the layout of Magma's website have changed, the code for
magma_free() should be updated. Just want to bring to your attention.
I have edit file according new redesign of Magma's website
Sage-4.6.3/local/lib/python2.6/site-packages/sage/interfaces/magma_free.py
In atachment there is result.
It work for example as in documentation:
print magma_free(Factorization(9290348092384))
[ 2, 5, 290323377887, 1 ]
I don't understand Magma and can't know more difucult examples, so it
must be verified !!!
magma_free.py
3KViewDownload
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[sage-support] Re: Interfacing with Pari
Victor,
It is quite likely true that the functionality which you are using
from PARI/gp is usable from Sage without you needing to do the
interface yourself.
For example:
sage: E = EllipticCurve([0,0,-1,1,0])
sage: an = E.anlist(1000)
sage: q = CC(2*pi*I*(0.1+0.2*I)).exp() // randomly chosen point in
upper half-plane!
sage: sum([an[n]*q^n for n in range(1,1000)])
0.175210435119826 + 0.0210885398756192*I
Note also
sage: phi = E.modular_parametrization()
sage: phi(0.1+0.2*I)
(13.1933643695215 - 15.0369223250467*I : -25.6051807665959 +
85.5625648931529*I : 1.00)
John Cremona
On Dec 11, 10:06 pm, Jeroen Demeyer jdeme...@cage.ugent.be wrote:
On 2010-12-11 20:24, victor wrote:
I work with 'Sage Version 4.6, Release Date: 2010-10-30' on a Mac OS X
10.6.5.
I have some problems interfacing with Pari, probably due to my
inexperience. Could you please tell me why do I get the errors below?
The problem with what you are doing is that Sage variables and PARI
variables are completely distinct. In fact, it is probably best to
avoid PARI variables as much as possible and use only Sage variables.
sage: E = pari('ellinit([0,0,1,-1,0])')
Here, E is a Sage variable.
sage: pari('a=ellan(E,1000)')
You are trying to use a Sage variable in PARI, which doesn't work
I know I can instead do the following, which works:
sage: a=pari(E.ellan(1000))
This works indeed. Note that you don't need the pari() here, because
E.ellan() already returns an object of type gen (which is the type for
PARI objects).
But then the line below produces again a similar error:
sage: pari('sum(n=1,5,a[n]*q^n)')
If you want to do this, you could do
sage: pari('a=%s; sum(n=1,5,a[n]*q^n)'%a)
Here, %s is replaced by the string representation of a. Note that
this is not very efficient because strings are used, it is also error-prone.
Jeroen.
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[sage-support] Re: Minimum Spanning Trees
Thanks Minh! I must say, it's rather exciting having open source software that fits my needs so well and is both well and speedily maintained. I hope to get more involved in the future with this incredible software and community. Graham On Dec 10, 2:07 am, Minh Nguyen nguyenmi...@gmail.com wrote: Hi Graham, On Mon, Dec 6, 2010 at 4:57 AM, Graham Enos graham.e...@gmail.com wrote: I wasn't sure if I should submit a ticket on this or not, since it seems to fall under unexpected behavior rather than software bug. I've been working through some small graph theory problems and was computing minimum spanning trees on graphs with weighted edges (where edges were assigned a weight as their label). I was getting completely unexpected behavior; after some digging, I found that G.min_spanning_tree() defaults to setting all edge weights to 1, even if the edges have weights assigned. The patch at ticket #10433 http://trac.sagemath.org/sage_trac/ticket/10433 should fix the problem you were experiencing, at least for the case where you use Kruskal's algorithm to find a minimum spanning tree. -- Regards Minh Van Nguyen -- 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: Installing SAGE alongside existing Python installation
Hmm, you are right, I might break something if I don't stuck in 2.6... All right, thank you very much anyway. On Dec 12, 3:57 pm, Harald Schilly harald.schi...@gmail.com wrote: On Sunday, December 12, 2010 3:49:33 PM UTC+1, Juanlu_001 wrote:Is there any way to accomplish what I'm asking? I do not fear the shell or source code. It's possible and done for some linux distributions, but I don't think it's a good idea for you. You can look into Sage's local/lib/python2.6 folder, where you can see that you can only save about 40MB (all the rest is in the site packages which are part of sage anyways). Also, Sage is only tested to work well with the given python version. That might not be true for other ones, because some libs directly access python internal datastructures that might be subject to changes and so on. Rather, you could go the other way round and use sage -python as your python interpreter or work inside the Sage Environment via $ sage -sh ... depending on what you want to accomplish. H -- 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: show()ing 3-tuples of matrices as images?
On Fri, 10 Dec 2010 at 10:09AM -0800, jvkersch wrote: On Dec 9, 9:57 pm, Dan Drake dr...@kaist.edu wrote: *facepalm* That was stupid -- matrix_plot() already accepts numpy arrays of shape (x,y,3) and plots them as a color image exactly the way I want. No need to mess around with pylab.imshow(). Sorry for the noise. Actually, your message gave me some good ideas of how to visualize the SVD decomposition in my linear algebra class, so not noise at all :) Here's a published version: https://sagenb.kaist.ac.kr:8066/home/pub/23 Enjoy. Dan -- --- Dan Drake - http://mathsci.kaist.ac.kr/~drake --- signature.asc Description: Digital signature
[sage-support] Having trouble getting *ultra* high precision in this infinite sum calculation...
I wanted to confirm that a certain infinite sum agrees with a certain number to thousands of digits of accuracy. I know this is true from a fascinating formula at the top of page 2 of the paper referenced here: http://arxiv.org/abs/math.GM/0409014/ The following one liner outputs the error in the sum sage: n(100*sqrt(pi/log(10.0))-sum(10^(-k^2/1.0) for k in range(-1,1))) -1.27897692436818e-13 My finite sum should approximate the infinite sum more accurately as I change the 1 to 2 but it does not sage: n(100*sqrt(pi/log(10.0))-sum(10^(-k^2/1.0) for k in range(-2,2))) -1.27897692436818e-13 Why isn't the error improving as I increase the number of terms that are summed? Am I doing something wrong in Sage? (Yes it is possible that this infinite sum converges unimaginably slowly so I wanted to check first I wasn't doing something dumb.) Thanks, Chris -- 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
