Re: [Matplotlib-users] "batch" plots

[John H. <jdh...@ac...>]

>>>>> "Christopher" == Christopher Fonnesbeck <ch...@fo...> writes:

    Christopher> First off, I want to congratulate the authors of
    Christopher> matplotlib for making a great package. This is the
    Christopher> python plotting library I've been waiting for.

Thanks!

    Christopher> I'm trying to use matplotlib on OSX (so with WX
    Christopher> rather than gtk) in conjunction with my own code that

Not necessarily.  pygtk, gtk-2, etc... have been packaged for fink.
I'm going to try and install them on my powerbook when I get a few
minutes.

    Christopher> produces Markov chain Monte Carlo simulations. At the
    Christopher> end of the simulation, I try to plot traces and
    Christopher> histograms of all of the sampled values. However,
    Christopher> matplotlib gets stuck on the first plot. After
    Christopher> calling show(), it does not move to the next line of
    Christopher> code for some reason, but instead hangs. When I try
    Christopher> and close the plot manually, it terminates the python
    Christopher> code. How can I get matplotlib to produce a new plot
    Christopher> each time it is called, moving on after each plot is
    Christopher> produced, displayed and saved to file. Here is a
    Christopher> sample function from my code:

show must be the last line of your script.  Is it possible to do all
the figures in the loop and then call show?  If your number of figures
is very large, you could run into memory problems this way.  There is
a work-around, but if you can do it all in memory that is the easiest
solution

for i in range(1,10):
    figure(i)
    # do plot i
    savefig('plot%d'%i)
show()

This is an area that I am actively working on (in fact I was working
on it when you emailed!) so if this isn't a viable solution for you
let me know.  I'm implementing some features to make it easier to use
matplotlib in with xvfb (virtual x) so you can produce plots in wx or
gtk without launching the GUI windows.

JDH