strange contour plot

I’m having a strange problem with my contour plots and I’m hoping someone here will be able to help. I had a dataset that was plotting fine until I decided I wanted to create plots with the data mirrored over the x-axis. This seems to work fine most of the time, but every now and then I get a plot that seems to just ignore a couple of data points when creating the contours. I’ve attached a plot of what I mean. Looking at the arrays the contour plot is created from doesn’t show any obvious problems (there are values there that should be plotted). It’s very strange, any ideas?

matplotlib 0.98.5.2
numpy 1.2.1
python 2.5.1

-Jeffrey

strange-contour.png

You might be running into one of the path simplification bugs in the 0.98.x series. Have you tried with the rcParam path.simplify turned off? If you can sent me a self contained script and data off-list, I can test this against the SVN version to see if this has already been addressed.

Cheers,
Mike

Jeffrey Fogel wrote:

···

I'm having a strange problem with my contour plots and I'm hoping someone here will be able to help. I had a dataset that was plotting fine until I decided I wanted to create plots with the data mirrored over the x-axis. This seems to work fine most of the time, but every now and then I get a plot that seems to just ignore a couple of data points when creating the contours. I've attached a plot of what I mean. Looking at the arrays the contour plot is created from doesn't show any obvious problems (there are values there that should be plotted). It's very strange, any ideas?

matplotlib 0.98.5.2
numpy 1.2.1
python 2.5.1

-Jeffrey
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Michael Droettboom
Science Software Branch
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Space Telescope Science Institute
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