John Pye wrote:
> Hi all
>
> I have got some funny behaviour here that looks like a bug with the
> spy() function. Using the latest python-matplotlib 0.87.5 package on
> Ubuntu 6.10, I try:
>
> $ ipython -pylab
> from scipy import io
> M = io.mmread('gd.mm')
> spy(M)
> M.shape
> M.nnz
>
> It looks great and I get the necessary number of dots on my 'spy' plot.
> Then:
>
> spy(M.todense())
>
> This seems to plot only half of the points. At first I thought the
> 'todense' function must be to blame, however:
>
> D = M.todense()
> for i in range(0,231):
> for j in range(0,231):
> if D[i,j]:
> print i,j,D[i,j]
>
> gave me the right data, so it really looks like a bug with spy().
>
> And FWIW spy2(M) fails with an error, whereas spy2(D) shows the same bug
> as spy(D).
>
> Is this something that has been fixed in the new 0.90 release?
The two versions of spy were merged into one, with some rewriting, in
0.90. Please give it a try and see if the problem persists.
Eric
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