matplotlib-users

[Matplotlib-users] New log plot problem

[Stephen W. <ste...@cs...>]

Hi, all,

Well, I've hit a new problem with the log plotting issue.  Try the 
following commands after 'ipython -pylab':

x=arange(25)+1
semilogx(x,x**2)
hold(False)
semilogx(x,x**2)

I get an apparently unbreakable chain of "Cannot take log of nonnegative 
value" messages for every following plot(), semilog(), or loglog() 
command until ipython is exited.  None of close(1), clf(), or cla() 
helps clear the problem.  Only creating a new figure with figure(2) and 
plotting to it seems to help.

Re: [Matplotlib-users] New log plot problem

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

>>>>> "Stephen" == Stephen Walton <ste...@cs...> writes:

    Stephen> Hi, all, Well, I've hit a new problem with the log
    Stephen> plotting issue.  Try the following commands after
    Stephen> 'ipython -pylab':

    Stephen> x=arange(25)+1 semilogx(x,x**2) hold(False)
    Stephen> semilogx(x,x**2)

    Stephen> I get an apparently unbreakable chain of "Cannot take log
    Stephen> of nonnegative value" messages for every following
    Stephen> plot(), semilog(), or loglog() command until ipython is
    Stephen> exited.  None of close(1), clf(), or cla() helps clear
    Stephen> the problem.  Only creating a new figure with figure(2)
    Stephen> and plotting to it seems to help.

rm -rf your build subdir and reinstall matplotlib 0.72.1 or CVS.  The
error string you report doesn't exist in the current code base, and I
can't reproduce your error.

JDH

Re: [Matplotlib-users] New log plot problem

[Stephen W. <ste...@cs...>]

John Hunter wrote:

>rm -rf your build subdir and reinstall matplotlib 0.72.1 or CVS.
>
Ouch.  Sorry for the noise.  I slipped up when I ran Fernando's 
pybrpm-noarch script on matplotlib 0.72 and wound up with a reinstall of 
an old 0.70 RPM.