On Tue, Feb 1, 2011 at 11:09 AM, Francesco Benincasa <
francesco.beninc...@bsc.es> wrote:
> Hi all,
>
> I'm using pygrads for plotting maps from netcdf files.
>
> I use the contourf method, but I'm not able to fill the region where there
> are
> no value (there is the missing value -999) with a color. It seems to ignore
> the set_bad method that I used to make the colormap.
>
> Any suggestions?
>
> Thank you very much in advance.
>
> --
> | Francesco Benincasa
>
>
Most likely, the issue is that set_bad is more for setting the color when
encountering masked values (through masked arrays). As a quick and dirty
way to deal with it, try setting that color through the set_under() method.
The correct way to do this is to use set_bad, but convert your numpy array
that you are displaying into a masked array like so:
z_ma = np.ma.masked_array(z, mask=(z == -999))
and use contourf on z_ma.
Let us know how that works for you.
Ben Root
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