[ncl-talk] get color names/values

[Mary Haley]

Hi Ioana,

I know Guido already answered your question, but I wanted to address the
issue of the getvalues error.

I didn't see your full code, but if you were calling something like
"gsn_csm_contour_map", then in order to retrieve the contour levels, you
need to do this:

plot = gsn_csm_contour_map(....)

;---Retrieve contour levels and colors
getvalues plot at contour
  "cnLevels"     : levels
  "cnFillColors" : colors
end getvalues

This is because "gsn_csm_contour_map" actually returns a map object, with
the contour object attached as an attribute called "contour".

--Mary


On Wed, Jan 6, 2016 at 5:53 AM, Ioana Colfescu <ioana.colfescu at ed.ac.uk>
wrote:

> Hi,
>
> I'd like to use exactly the same colors as in a first plot in a second one.
>
> I set the colors for plot 1 manually :
>
>    tres at cnFillPalette         = "BlWhRe"
>    tres at cnLevelSelectionMode  = "ManualLevels"
>    tres at cnMinLevelValF       = -0.03
>    tres at cnMaxLevelValF       =  0.03
>    tres at cnLevelSpacingF      =  0.005
>
> Does anyone know how can I get the exact colors ( name/index) used so
> that I can pass them on to the second one ? getvalue doesn't work and I
> get an error that says the cn levels are not defined.
>
> Thanks,
> Ioana
>
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