[Matplotlib-users] pcolor

Dear list,

I have a question concerning pcolor.
I am trying  to plot a huge 2d array 15000x10000.
And in top I see that the program already uses 31Gb of ram and it grows.
Is this expected behaviour?
Why it needs so much memory?
the sctipt is simple:

import matplotlib
import numpy as np
import matplotlib.pyplot as plt

from numpy.random import rand

import mpl_toolkits.basemap as bm 


if __name__ == "__main__":

    print matplotlib.__version__
    print matplotlib.__revision__
    print matplotlib.__date__
    
    
    print 'basemap'
    print bm.__version__
    
    print 'numpy'
    print np.__version__

    
    x = rand(15000,10000)
    #print x
    plt.pcolor(x)
    plt.savefig('test_pcolor.png', bbox_inches = 'tight')
    print "Hello World"

matplotlib version is:
1.0.0
$Revision: 8503 $
$Date: 2010-07-06 08:56:31 -0500 (Tue, 06 Jul 2010) $

should I update?

thank you for any help
--
Oleksandr Huziy
-- 
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