Hello,

I am having trouble viewing scatter plots of large data sets

with the GTK backend. The plots are sparsity patterns of

sparse matrices, much in the way of Matlab's spy function.

First of all, there may be a conflict somewhere with my

version of GTK/PyGTK; issuing a plot() or scatter() command

often results in the message 'None Active' being displayed.

After a couple of seconds, the python prompt comes back, and

the 'scatter' command results in a huge number of messages

of the form

<matplotlib.patches.Circle instance at 0x4531730c>

begin displayed; litterally hundreds of them---it takes some

10 seconds. Finally, a show() opens up a Figure window, but

no plot. The matrix has 80519 nonzero elements and is

symmetric, so the scatter plot contains roughly twice as

many points. I have a Gnuplot interface and a spy-like

function which works just fine and displays the pattern in a

matter of a fraction of a second.

Sometimes, a plot using the GTK backend gets stuck in

gtk.mainloop(), and i have to interrupt it with Ctrl-C. I am

using SuSE Linux 8.0. I have installed the most recent

versions of GTK and PyGTK.

Thanks in advance for any suggestions.

Dominique