I am trying to create a lat/lon mask using if statements. I create two overlapping masks and then want to combine them. I would assume I should use ?or? to combine the two regions. However, using either ?and? or ?or? in the masking definition, I get the same result. Is this a bug or am I doing something wrong? I am using Ferret v6.65.
See the following script for a quick example:
use coads_climatology sh d let mask1=if y[gy=sst] lt 20 then 1 let mask2=if y[gy=sst] gt 0 then 1 let mask3 = if (mask1 and mask2) then 1 let mask4 = if (mask1 or mask2) then 1
fill/l=1 sst*mask1 pause fill/l=1 sst*mask2 pause fill/l=1 sst*mask3 pause fill/l=1 sst*mask4 q
Thanks. Carol |