What I usually do is to clear the axis (using cla() only) right after
creating or accessing it (either with figure() or subplot() or similar
magic):
from pylab import *
fig = figure(num=1)
for example in range(5):
cla()
plot(rand(100))
savefig(‘test-%d.png’%example)
···
Subject:
[Matplotlib-users] Clearing A Figure (I Know That This Has
Been Posted Before But I Does Not Work For Me)
Date:
Tue, 25 May 2010 02:08:42 -0700 (PDT)
From:
Thistleryver
To:
<mhar244@…3120…>matplotlib-users@lists.sourceforge.net
I am attempting to run a lot of tests automatically and generate a graph for
each one. However, at the moment, the previous graph remains on the figure
and the next plot is drawn over it.
I have read extensively the documentation and I have tried a whole lot of
different commands but to no avail. In the previous post it said to use
pylab.clf() which is exactly what I've been trying to use.
So far I have used pylab.cla(), pylab.clf() and pylab.close() although I
believe that this only closes an open figure window. I have no idea why it
is not working now especially since it would appear that my question had
already been answered in both the documentation and the forums.
I am using Python 2.6.4 on Ubuntu Linux.
Here is the relevant code I am using:
pylab.plot(xAxis, TrainingPoints, 'b-')
pylab.plot(xAxis, TestPoints, 'r-')
pylab.xlabel('Epochs')
pylab.ylabel('Sum Squared Error')
pylab.title('Plot of Iris Training Errors')
outfilename = str(int(LEARNING_RATE)) + ".png"
print outfilename
pylab.ylim(ymin=0)
pylab.savefig(outfilename)
pylab.cla()
pylab.clf()
I really hope one of you can spot an error otherwise I am completely stuck.
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