[gradsusr] draw contour border

[Davide Sacchetti]

I'm not sure I understood well your question
anyway if you want to display your contour (level 0 only) just where
your CFSR is greater than 3.5 you could use:
set gxout contour
set clevs 0
d maskout(your_variable,cfsr-3.5)
it should work
Bye
Davide

Il giorno lun, 27/02/2017 alle 16.04 +0300, Mubashar Ahmad ha scritto:
> Dear GrADS users,
> 
> I would like to draw 0 contour border (over tropical  ITCZ region) in
> the upper panel of attached figure. If I simply use command "set
> gxout contour, or 'set clevs 0'  and then display my variable it will
> draw many contours, but I don't want to display 0 values every where,
> instead  I want it across ITCZ area (tropical region, red color) in
> the upper panel of attached figure. How can I do it in GrADS?
> 
> Thanks and best regards,
> 
> Mubashar
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