[gradsusr] RH calculation

[Frank Colby]

Hi Grads Users,

I have gridded data that has variables for temperature, geopotential, 
specific humidity, u and v wind components, all defined on pressure levels.

I would like to display RH in cross section, but to do so, I need to 
define a new variable.  I could do that, but the pressure level is used 
in the calculation, and pressure level is a dimension, not a variable.

Does anyone know how I can do this?

Thanks,

Frank Colby
UMass Lowell
Lowell, MA
USA