When I do contourf plots in matplotlib, I get lines connecting the contour levels. This doesn't only appear to be an artifact of my plotting algorithms, it appears in this example from the matplotlib cookbook:

http://www.scipy.org/Cookbook/Matplotlib/Gridding_irregularly_spaced_data

at least on my mac.

(I think this is the link to the output I get from that:
https://dl-web.getdropbox.com/get/Photos/griddata-test.png?w=007c9af9
)

Is there a way to keep these lines from happening? If not, is there a way to turn off all of the black lines separating the contour levels?

Thanks in advance,

Rick

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Rick Muller
rpmuller-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org