Does it help if you add a call to "plt.clf()" to the bottom of the loop?
The pyplot interface keeps a reference around to every figure created
until they are destroyed so that it can be obtained again by number
(this is functionality inspired by matlab). Alternatively, you can use
the object-oriented interface to create the figure, which does not have
this behavior, e.g., replace
fig = plt.figure()
with
from matplotlib import figure
fig = figure.Figure()
If all this doesn't help, let me know and I'll look further.
Cheers,
Mike
iCy-fLaME wrote:
> I was trying to use matplotlib to plot a series of 2D images, but
> python was using up a large amount of RAM very quickly. I don't know
> matplotlib that well, so the chance are I am missing something, would
> appreciate it if anyone can point me to the right direction.
>
> I am using:
> Python 2.4.3 (#1, Jan 21 2009, 01:11:33)
> [GCC 4.1.2 20071124 (Red Hat 4.1.2-42)] on linux2
>
> Example code to run in interpreter mode:
>
> ########################################
> from numpy import zeros
>
> x = 1651
> y = 452
> page = zeros((x, y)).astype('float')
>
> import matplotlib
> matplotlib.use('Agg')
> import matplotlib.pyplot as plt
>
> for i in range(1000):
> fig = plt.figure()
> ax = fig.add_subplot(111)
> cax = ax.imshow(page, cmap=plt.cm.spectral_r, extent=(-44, 176, -30,
> 30), interpolation = 'bicubic', vmin = -0.003, vmax = 0.003)
> title = "Time = %(i)0.3es)" % {'i':i}
> ax.set_title(title,fontsize=14)
>
> fig.colorbar(cax, ticks=[-2e-3, -1e-3, 0, 1e-3, 2e-3],
> orientation='horizontal')
>
> fig.savefig('_tmp.' + str(i) + ".png", dpi=300)
>
> ############### EOF ################
>
>
> I tired to delete everything in the namespace, but the only way I can
> release the ram is by killing the python session.
>
>
>
> Thanks for all the helps in advance.
>
>
>
> iCy
>
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--
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA
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iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian
Group, R/GA, & Big Spaceship. http://www.creativitycat.com
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