[ncl-talk] colur table issue

[Mary Haley]

Hi Saurabh,

It's a subtle thing, but what's happening is that the gsn_csm_contour_map
function is spanning the full contour plot, and wrf_contour is not.

If you want the color bar to look like the TRMM one, then when you call
wrf_contour, you need to set:

opts at gsnSpreadColors = True

If you want the color bar to look like the WRF one, then when you call
gsn_csm_contour_map you need to set:

res at gsnSpreadColors = False

It's possible that wrf_contour may give you a warning about
gsnSpreadColors. Let me know if this happens.

--Mary


On Fri, Apr 21, 2017 at 5:23 AM, Saurabh Singh <saurabhsingh123op at gmail.com>
wrote:

>
> NCL version 6.4.0
>
> I am using ncl to plot wrf and TRMM output side by side. My contour
> settings are following for TRMM:
>
>   res at cnLevelSelectionMode = "ManualLevels"
>   res at cnMinLevelValF  = 1. ; set the minimum contour level
>   res at cnMaxLevelValF  = 30. ; set the maximum contour level
>   res at cnLevelSpacingF = 2.
>   res at cnFillPalette = "precip2_17lev"
> plot(1) = gsn_csm_contour_map(wks,rain3,res)
>
> and for WRF my contour settings are following:
>
>   opts at cnLevelSelectionMode = "ManualLevels"
>   opts at cnMinLevelValF  = 1. ; set the minimum contour level
>   opts at cnMaxLevelValF  = 30. ; set the maximum contour level
>   opts at cnLevelSpacingF = 2.
>   ;opts at cnLevels     = cl1
>   opts at cnFillPalette = "precip2_17lev"
>   contour = wrf_contour(b,wks,full(:,:),opts)
>    plot(0) = wrf_map_overlays(b,wks,(/contour/),pltres,mpres)
>
>
> However, in my plots, i see a mismatch between the WRF and TRMM contour
> color table. i.e TRMM has an orange for range(23-25) while WRF [image:
> Inline images 1]has yellow for this range. please find the attached plots.
>
> Regards
>
> --
> With regards
> Saurabh Kumar singh
>
>  *P** : * *Please consider the environment before printing this e-mail*
>
>
>
>
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