[ncl-talk] Error: 'warning:ContourPlotInitialize: scalar field is constant'

[Rick Brownrigg]

Hi Abhimanyu,

Do you know which variable this is occuring on?  I see you are manually
setting contour levels based upon variable -- you might put some print
statements to print min/max of each variable and make sure your contour
levels are appropriate.

The message is pretty self explanatory -- if all the data is constant (or
nearly so), the are no isolines to be plotted. NCL used to produce a blank
plot is such cases. The resource mentioned, cnConstFEnableFill, will at
least allow the plot to be shaded at whatever color the constant values map
to in your colormap.

Hope that helps...
Rick


On Mon, May 22, 2017 at 10:15 AM, Abhimanyu Mittal <
abhimanyu_mittal at outlook.com> wrote:

> Hello,
>
> While reading all the fields in the geo_em file and plotting them, I am
> getting the following error.
>
>
> ~$ warning:ContourPlotInitialize: scalar field is constant; no contour
> lines will appear; use cnConstFEnableFill to enable fill
>
>
> For the reference, I have also attached the .ncl file.
>
>
> Regards
>
> Abhimanyu Mittal
>
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