Ryan,
I have noticed the same issue with contourf. It seems to be a thin gap
between neighboring polygons showing through. You can turn on a thin
contour line of the same color to cover the gap:
for c in pylab.contourf( x, y, z ).collections:
c.set_linewidth( 0.1 )
Not ideal, but it works.
-Geoff
On Nov 12, 2009, at 5:42 AM, Ryan Neve wrote:
> Thank you for the suggestion, but I couldn't see a difference with
> "antialiased" either True or False. The lines between contour levels
> remain.
> I tried a different colormap (spectral) but it had the same effect.
> I tried more color levels (256) but the effect got worse.
>
> I can't find any example pictures online of matplotlib's contourf()
> producing a "smooth" plot, I know matlab's does it:
> http://www.mbari.org/bog/Projects/CentralCal/summary/images/m1_nuts_ts_contour.jpg
>
>
> -Ryan
>
> On Wed, Nov 11, 2009 at 5:08 PM, Eric Firing <[email protected]>
> wrote:
> Ryan Neve wrote:
> Hello,
> In my filled contour plot: http://imgur.com/vXoCL.png
> There are faint lines between the contour levels. I think they are
> yellow since they disappear in the yellow parts of the graph and are
> most obvious in the red areas. Is there any way to get rid of these
> lines? The number of contour levels is arbitrary, and I don't need
> them emphasized with a moire pattern.
>
> Try experimenting with the "antialiased" kwarg in your call to
> contourf. It is a boolean; see if a value of True or False gives a
> better result.
>
> Eric
>
>
> Thank you,
>
> -Ryan
>
>
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