On 08/13/2010 07:20 AM, Benjamin Root wrote:
> On Fri, Aug 13, 2010 at 12:11 PM, Eric Firing <efir...@hawaii.edu
> <mailto:efir...@hawaii.edu>> wrote:
>
>     On 08/13/2010 06:20 AM, Benjamin Root wrote:
>      >
>      >
>      > On Thu, Aug 12, 2010 at 3:58 PM, Eric Firing <efir...@hawaii.edu
>     <mailto:efir...@hawaii.edu>
>      > <mailto:efir...@hawaii.edu <mailto:efir...@hawaii.edu>>> wrote:
>      >
>      >     On 08/12/2010 09:56 AM, Benjamin Root wrote:
>      >
>      > > Btw, the current set of tests has a failure for testing pcolormesh.
>      > > Wasn't there a change fairly recently to fix a problem with
>      >     pcolormesh,
>      > > so that the test image should now be updated?
>      >
>      >     Mike did update the images a couple weeks ago, and when I run
>     the tests,
>      >     I don't get that failure.  Is it possible that you have not
>     done a clean
>      >     rebuild and install since Mike's changes?
>      >
>      >     Eric
>      >
>      >
>      > Visually, I can't see the difference between the expected and the
>      > generated images, but the test system is reporting a RMS of
>     116.512.  I
>      > have tried completely clean installs of the trunk version of
>      > matplotlib.  The same happens for completely clean installs of the
>      > maintenance branch as well.
>
>     This may be a limitation of the test system, then.  I think that
>     differences in external libraries can cause subtle output differences,
>     triggering a false failure alarm.  Maybe the tolerance needs to be
>     increased for this particular test.
>
>     Eric
>
>
> Or maybe there is a bug in how it is calculating the differences?  I am
> flipping back and forth between the images in eog and I can't figure out
> what is different.
Can you see it in the actual difference png?

If it were a problem in calculating the difference, I would expect it to 
be consistent among systems and to show up in all image comparison tests.

Eric
>
> Ben Root


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