[gradsusr] GrADS convert longitude west to east

[Tracey]

​Hi GrADS users,

Is there a GrADS function or script that converts degrees west longitude
into degrees east?  For example, if I input "lonmin" and "lonmax" arguments
into a GrADS script and I wanted to convert those longitudes from degrees
west to degrees east within the script by defining new "lonmin" and
"lonmax" variables?

Thanks in advance for any help,
Tracey​
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