I am having problems with matplotlib, Sage plotting and, apparently, backends. I have installed Sage 6.2 on my Mac Book Pro (system 10.6) (I just upgraded from Sage 4.2). I have removed all copies of matplotlibrc from my computer except for the file buried in Sage-6.2/.../mpl_data/. All choices of backend resulted in the errors: _backend not found, where _backend is the name of the library that should load for the backend (e.g. _tkagg for TKAgg). My partial solution is to use the _tkagg from my prior Sage version which I produced by a compile many years ago before I had Sage.
I have tried several scenarios to run my code: iPython (in Terminal), Sage (in Terminal), and as a script. Scripts and iPython are run through the Sage 6.2 package. I mostly run from script which has the most problems. The most successful situation is with TKAgg. However, calling plot(...) and show() from pylab and D.show() from Sage (where D is a graph) have different successes. Here is a table of what does and does not work (view with monospace font). *Backend Plot call iPython Sage Script* *TKAgg D.show() Yes Yes No (but Preview does launch)* * pylab.plot() Yes Yes Yes * *No* *Backend D.show() Yes Yes No (but Preview does launch)* * pylab.plot() No No No* No Backend means I commented out the backend statement in matplotlibrc. TKAgg is the most successful, but not fully. And I had to add the _tkagg library to the Sage package. Sorry for the verbose post, but I thought I'd try several things, first. I did see a previous post about some bug in Sage 6.2 using the wrong .matplotlib folder, but I don't know what that tells me. I can limp along with what I have above, but any help very appreciated. -------------------------------- Code generating problems: (1) D.show() version: *adjls=[[0, 1, 0, 1], [1, 0, 1, 0], [0, 1, 0, 1], [1, 0, 1, 0]]* *M= Matrix(adjls)* *D= Graph(M)* *D.show()* (2) pylab.plot version: *import numpy as NP* *import pylab as PL* *x= NP.array([1,2,3,4])* *y= x**2* *PL.plot(x,y)* *PL.show() * -- 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/d/optout.
