On Thu, Aug 11, 2011 at 10:46 AM, Ned <a.g.bas...@durham.ac.uk> wrote:
> Hi,
> I'm trying to sort out interactive use with standard python but am having
> problems.
> If I do:
> import matplotlib
> matplotlib.use("TkAgg")
> matplotlib.interactive(True)
> import pylab
> pylab.ion()
> pylab.plot([1,2,3,4])
>
> Then I would expect a plot to appear. But it doesn't. I then have to
> call:
>
> pylab.draw()
>
> twice before getting the plot (the first call brings up an empty plot
> window, while the second displays the plot).
>
> Then, if I do:
> pylab.plot([1,2,3,2,3,4,5])
> again, it does nothing, until I do
> pylab.draw()
>
> Also the window isn't sensitive to expose events - if it is blocked by
> another window/minimised etc, then the contents don't reappear, just go
> blank.
>
> So, it is semi-interactive, in that I can use the python command line to
> add new lines, but I have to call draw each time (which I shouldn't have
> to), and also it doesn't redraw itself correctly.
>
> Can anyone give ideas?
>
>
The problem is mostly with the version of matplotlib you have. Significant
effort went into interactivity for v1.0.x, and I believe your problem would
be greatly eliminated by using v1.0.1. You are right, you shouldn't have to
call draw() all the time.
> I'm running on ubuntu 10.04 32bit, with distro package 0.99 for
> matplotlib. I haven't been able to find anything that helps online
> either.
>
>
I don't remember who was hosting it, but I recall someone had a matplotlib
v1.0.1 PPA. I also believe that we got everything fixed for release to
Debian (and thus Ubuntu) for the upcoming Ubuntu. Anybody know where that
PPA is?
Ben Root
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