Re: [sage-combinat-devel] Combinatorica-like commands in Sage
> I'm still stuck at creating my digraph from my csv file. My csv file is
essentially an adjacency matrix of 0's and 1's. I can import it, but I
can't convert it into an adjacency matrix that can then be created into a
digraph. Any more ideas? Thanks in advance for any help.
What about this ?
sage: cat "dg.csv"
0, 1, 0, 1
1, 1, 0, 1
1, 0, 0, 1
0, 0, 0, 1
sage: f = open("dg.csv",'r')
sage: # Removing '\n' and splitting into cells
sage: entries = map(lambda x:x.strip('\n').split(','), f.readlines())
sage: entries
[['0', ' 1', ' 0', ' 1'], ['1', ' 1', ' 0', ' 1'], ['1', ' 0', ' 0', ' 1'],
['0', ' 0', ' 0', ' 1']]
sage: # Casting from str to integers
sage: entries = map(lambda x:map(Integer,x), entries)
sage: entries
sage: # A matrix
sage: m = Matrix(entries)
sage: m
[0 1 0 1]
[1 1 0 1]
[1 0 0 1]
[0 0 0 1]
sage: # A Digraph
sage: D = DiGraph(m)
sage: D.edges()
[(0, 1, None), (0, 3, None), (1, 0, None), (1, 1, None), (1, 3, None), (2,
0, None), (2, 3, None), (3, 3, None)]
Nathann
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[sage-combinat-devel] Installation problem
Hello, I don't know if I write to the right group. Please tell me if I am wrong. I try to install sage-combinat but it doesn't work. I use Sage 4.7. I tried to use the command sage -combinat install in the sage root directory and got the following error message: [root@localhost sage]# sage -combinat install /bin/sh: /usr/share/sage/sage: No such file or directory Error: Cannot determine Sage version number from I also tried to run the same command in the directory sage/local/bin and got the same error message. Finally, I tried the command ./sage- combinat install in the same directory but it does not work [root@localhost bin]# ./sage-combinat install Creating sage-combinat branch: sage -b main sage-run received unknown option: -b usage: sage [options] Try 'sage -h' for more information. Abort Could you please help me ? Best wishes, Matthieu -- You received this message because you are subscribed to the Google Groups "sage-combinat-devel" group. To post to this group, send email to sage-combinat-devel@googlegroups.com. To unsubscribe from this group, send email to sage-combinat-devel+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sage-combinat-devel?hl=en.
[sage-combinat-devel] Re: dot2tex, combinat
I had the same problem as William, but I am even further back. I
don't understand how to get sage -sh to work. I am running sage in
notebook form via VirtualBox on a Windows 7 machine. Typing the
command into the notebook prompt doesn't work, and I can't find a
command prompt which might indicate the shell. Thanks for any help
you can give.
Best, Bruce
On Nov 22, 10:38 am, Anne Schilling wrote:
> On 11/21/11 11:02 PM, William Stein wrote:
>
>
>
>
>
> > On Mon, Nov 21, 2011 at 7:01 PM, Anne Schilling
> > wrote:
> >> On 11/21/11 8:24 AM, William Stein wrote:
> >>> On Mon, Nov 21, 2011 at 8:08 AM, Dima Pasechnik wrote:
> This means you have graphviz spkg installed under macosx...
> I cannot seem to be able to accomplish this:
> http://trac.sagemath.org/sage_trac/ticket/7438
>
> >>> I installed graphviz under OS X by installing it from the Graphviz
> >>> website, instead of using the spkg.
>
> >> After installingdot2texusing
>
> >> sage -idot2tex
>
> >> does the command
>
> >> sage: CrystalOfTableaux(['A',2], shape=[1]).latex()
> >> '\n\\begin{tikzpicture}[>=latex,line join=bevel,]\n%%\n\\node (1) at
> >> (8bp,162bp) [draw,draw=none]
> >> {${\\def\\lr#1{\\multicolumn{1}{|@{\\hspace{.6ex}}c@{\\hspace{.6ex}}|}{\\raisebox{-.3ex}{$#1$}}}\\raisebox{-.6ex}{$\\begin{array}[b]{c}\\cline{1-1}\\lr{1}\\cline{1-1}\\end{array}$}}$};\n
> >> \\node
> >> (3) at (8bp,10bp) [draw,draw=none]
> >> {${\\def\\lr#1{\\multicolumn{1}{|@{\\hspace{.6ex}}c@{\\hspace{.6ex}}|}{\\raisebox{-.3ex}{$#1$}}}\\raisebox{-.6ex}{$\\begin{array}[b]{c}\\cline{1-1}\\lr{3}\\cline{1-1}\\end{array}$}}$};\n
> >> \\node
> >> (2) at (8bp,86bp) [draw,draw=none]
> >> {${\\def\\lr#1{\\multicolumn{1}{|@{\\hspace{.6ex}}c@{\\hspace{.6ex}}|}{\\raisebox{-.3ex}{$#1$}}}\\raisebox{-.6ex}{$\\begin{array}[b]{c}\\cline{1-1}\\lr{2}\\cline{1-1}\\end{array}$}}$};\n
> >> \\draw
> >> [blue,->] (1) ..controls (8bp,140.79bp) and (8bp,121.03bp) .. (2);\n
> >> \\definecolor{strokecol}{rgb}{0.0,0.0,0.0};\n
> >> \\pgfsetstrokecolor{strokecol}\n \\draw (17bp,124bp) node {$1$};\n \\draw
> >> [red,->] (2) ..controls (8bp,64.789bp) and (8bp,45.027bp) .. (3);\n
> >> \\draw (17bp,48bp) node {$2$};\n%\n\\end{tikzpicture}\n'
>
> >> work?
>
> > Yes.
>
> > When I was preparing my talk, I was evidently using sage-4.7.1. I
> > upgraded to a newer version of Sage, and the issue is totally
> > resolved. Sorry for the noise and thanks for the further debugging
> > questions.
>
> > Just to confirm, doing
>
> > sage: CrystalOfTableaux(['A',2], shape=[1]).latex_file('/tmp/a.tex')
> > sage:
>
> > no longer gives an error for me, and it *does* create the file
> > /tmp/a.tex and if I go to the /tmp directory, pdflatex it, and view
> > the
> > resulting pdf, then I get the diagram.
>
> By the way, you should be able to bypass the step of pdflatex in a directory
> by
> using the commands
>
> sage: C = CrystalOfTableaux(['A',2], shape=[1])
> sage: view(C)
>
> directly in Sage. The picture should just come up.
>
> Best,
>
> Anne- Hide quoted text -
>
> - Show quoted text -
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Re: [sage-combinat-devel] Combinatorica-like commands in Sage
I'm still stuck at creating my digraph from my csv file. My csv file is essentially an adjacency matrix of 0's and 1's. I can import it, but I can't convert it into an adjacency matrix that can then be created into a digraph. Any more ideas? Thanks in advance for any help. On Tue, Nov 22, 2011 at 2:42 AM, William Stein wrote: > On Mon, Nov 21, 2011 at 2:54 PM, Raymond N. Greenwell > wrote: > > When I try to import a csv file into Sage, Sage can't locate the file, > indicating that it's > > not looking in the folder where I put the file. How do I find where Sage > is looking, so > > I can put the file there? Note that this is on a Mac... > > You could use Terminal (and the cd command) to navigate to where the > file is and type "pwd", which means "print working directory". You'll > get something that looks a little like > > /Users/greenwell/math/stuff > > Use that path. > > -- William > > > > > Thanks! > > > > On Nov 11, 2011, at 4:42 PM, William Stein wrote: > > > >> On Wed, Nov 9, 2011 at 5:52 PM, Raymond N. Greenwell > wrote: > >>> I've been having some problems with Combinatorica, and someone > >>> suggested I try Sage. Can Sage import a csv file and then turn it into > >>> a graph, such as with the Combinatorica commands: > >>> m = Import["medalcomparison3.csv"] > >>> g = FromAdjacencyMatrix[m, Type -> Directed] > >> > >> Python (hence Sage) can import csv files as explained here: > >> > >> http://docs.python.org/library/csv.html > >> > >> Sage can make a graph out of an adjacency matrix A using the Graph(A) > command. > >> Type "Graph?" for more on making graphs from matrices etc. > >> > >> In Sage you can make matrices in many ways. Type "matrix?" for more on > how. > >> > >>> Also, can it give a minimum chain partition, such as with the > >>> Combinatorica command: > >>> MinimumChainPartition[g] > >> > >> As far as I can tell, this is not implemented in Sage. > >> > >>> I have found that this Combinatorica command does not always give what > >>> one would expect; the results seem to violate the Dilworth Theorem. > >>> > >>> Thanks! > >>> > >>> -- > >>> You received this message because you are subscribed to the Google > Groups "sage-combinat-devel" group. > >>> To post to this group, send email to > sage-combinat-devel@googlegroups.com. > >>> To unsubscribe from this group, send email to > sage-combinat-devel+unsubscr...@googlegroups.com. > >>> For more options, visit this group at > http://groups.google.com/group/sage-combinat-devel?hl=en. > >>> > >>> > >> > >> > >> > >> -- > >> William Stein > >> Professor of Mathematics > >> University of Washington > >> http://wstein.org > >> > > > > * > > Raymond N. Greenwell mat...@hofstra.edu > > Professor of Mathematics (516) 463-5573 > > 103 Hofstra University > > Hempstead, NY 11549-1030 > > http://people.hofstra.edu/rgreenwell > > > > > > > > -- > William Stein > Professor of Mathematics > University of Washington > http://wstein.org > > -- > You received this message because you are subscribed to the Google Groups > "sage-combinat-devel" group. > To post to this group, send email to sage-combinat-devel@googlegroups.com. > To unsubscribe from this group, send email to > sage-combinat-devel+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/sage-combinat-devel?hl=en. > > -- You received this message because you are subscribed to the Google Groups "sage-combinat-devel" group. To post to this group, send email to sage-combinat-devel@googlegroups.com. To unsubscribe from this group, send email to sage-combinat-devel+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sage-combinat-devel?hl=en.
[sage-combinat-devel] file importation in Sage on a Mac
When I try to import a csv file into Sage, Sage can't locate the file, indicating that it's not looking in the folder where I put the file. How do I find where Sage is looking, so I can put the file there? This is on a Mac, so I can't tell it C:\\ etc. Thanks! * Raymond N. Greenwell mat...@hofstra.edu Professor of Mathematics (516) 463-5573 103 Hofstra University Hempstead, NY 11549-1030 http://people.hofstra.edu/rgreenwell -- You received this message because you are subscribed to the Google Groups "sage-combinat-devel" group. To post to this group, send email to sage-combinat-devel@googlegroups.com. To unsubscribe from this group, send email to sage-combinat-devel+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sage-combinat-devel?hl=en.
[sage-combinat-devel] Re: [sage-devel] Symmetric polynomial in terms of elementary symmetric polynomials
On Sat, Dec 03, 2011 at 01:22:32AM -0300, Federico Lebrón wrote: > I've written a small pair of functions which could be useful: > > 1) A function is_symmetric which, given a polynomial, returns whether > or not the polynomial is a symmetric polynomial. > 2) A function symmetrize which, given a symmetric polynomial, returns > an equivalent expression in terms of the elementary symmetric polynomials. > > The code, which likely needs some cleanup (and modifications to do things > "the Sage way", whatever it may be), is here: http://codepad.org/gJpNRfHH > > Would there be interest in adding these to Sage perhaps? I tried searching > for similar functionality but couldn't find it. Please have a look at SymmetricFunctions and http://combinat.sagemath.org/doc/thematic_tutorials/demo-symmetric-functions.html and get back to us for more information if needed! Cheers, Nicolas -- Nicolas M. Thiéry "Isil" http://Nicolas.Thiery.name/ -- You received this message because you are subscribed to the Google Groups "sage-combinat-devel" group. To post to this group, send email to sage-combinat-devel@googlegroups.com. To unsubscribe from this group, send email to sage-combinat-devel+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sage-combinat-devel?hl=en.
