[gradsusr] new grads shade2, how to make transparent shades.

[Jennifer Adams]

You have to use -1 in the 'set ccols' command to tell GrADS not to draw a particular level. --Jennifer

On Nov 6, 2011, at 4:07 PM, Howard Staines wrote:

> I was wanting an explanation of how to use the new feature 2.0.0.1 grads
> As per features
> 
> * New shaded contouring algorithm: "set gxout shade2"
>       Polygons are closed, have no holes, do not overlap, and are as large
> and few in number as is feasible
>       Use of -1 for a color # will suppress drawing of the shaded contour,
> making it effectively transparent
> 
> I get errors from making -ve colour numbers
> For instance
> Set rgb -1 252 252 0
> 
> Gets an error 
> 
> Help appreciated
> 
> Regards
> 
> Howard Staines
> 
>     Metris Limited
> 
> phone 0800 372 433 - mobile 027 2785586 - P O Box 5136 Greenmeadows, NAPIER
> email info at metris.co.nz - info at metscape.net.nz - website www.metris.co.nz -
> www.metscape.net.nz
> 
> 
> 
> 
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--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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