Pressure Code (1013.2 -> 13.2)

[Alessandro Mandelli]

Christian Grob ha scritto:

> 'pressure' >= 1000 'd pressure -1000' else 'd pressure - 900'), but it
> didn't work, because Grads only supports variables which are strings, but
> not variables like 'pressure', which describe a full datalayer.

'd maskout(pressure-1000,pressure-1000)'

I'll let you figure out the simple solution to the other one.