[Matplotlib-users] runtime error; producing multiple images

[<aur...@fr...>]

Hi folks,

I have a question I couldn't solve so far. I'm trying to generate say 500=
 images
(png) without displaying them using imshow. I wrote a simple test functio=
n
(see below) which I call from a loop in which I create the data for the i=
mage in
a sequence. I systematically bump into a runtime error after saving about=
 188
files. After reading the (excellent) tutorial from Perry Greenfield and
Robert Jedrzejewski on interactive data analysis, I understand the need t=
o clean
up by freeing memory but I must be missing something else.

Cheers,

Aur=E9lien



def generateImshow(yarray,
                   xscansize,yscansize,
                   xscanstep,yscanstep,
                   outputfilename,
                   initimagesize =3D 10):
    '''Use this function to generate matplotlib images without displaying
them'''


    #reshape according to scan
    yarray =3D na.reshape(yarray,(yscansize,-1))

    #build image via matplotlib
    ximagesize =3D xscansize*xscanstep
    yimagesize =3D yscansize*yscanstep
    xyimageratio =3D float(ximagesize)/yimagesize
    print xyimageratio
    if xyimageratio > 1: ximagesize,yimagesize =3D
initimagesize,initimagesize*xyimageratio
    else: ximagesize,yimagesize =3D initimagesize*xyimageratio,initimages=
ize

    fig1 =3D pylab.figure(figsize=3D(ximagesize,yimagesize),dpi=3D100)
    #pylab.title('blahblah')
    im1 =3D pylab.imshow(yarray,
                 origin=3D'lower',
                 #aspect=3D'preserve',
                 #interpolation=3D'nearest',   #i.e. pixel
                 interpolation=3D'bicubic',   #i.e. smooth
                 #cmap=3Dmpl.cm.jet,          #not correct
                 #vmin=3Dminvalue,
                 #vmax=3Dmaxvalue
                 )
    pylab.colorbar()
    pylab.bone()
    pylab.axis('off')

    #save figure
    #outputfilename =3D filename[:-4]+'.png'
    pylab.savefig(outputfilename)
    #pylab.cla()
    del im1
    pylab.close('all')