This is a bug report.
I am using matplotlib 0.99.1 on Windows. When using contour with the
keyword
argument locator=ticker.FixedLocator(levels), the plot is always dropping
the first
and last contour level. If there are less than 3 levels, contour.py throws
an
exception.
My workaround is to duplicate the first and last levels when using the fixed
locator:
e.g. my argument becomes
locator=FixedLocator( [levels[0]] + levels + [levels[-1]] )
I have traced the problem to the last line in contour.py, method _autolev()
which
strips the first and last levels if the contours are not filled:
return lev[1:-1]
This line occurs at line 682 in my version of contour.py which came with the
0.991 installation.
I realize that I could specify the levels in the argument V and this does
work. However
this code is embedded in GUI-ness which allows the user to choose how the
contours
are selected. Passing the locator seems to be the best option code-wise.
Thank you,
Dave Smith
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