Hi Melanie,
The idea to use here is "masking",
http://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/variables-xpressions/XPRESSIONS#_VPID_181
You would define some variable which is 1 within your desired
region and missing elsewhere,
let mask = ...
let var_masked = if mask then 0.75*var
Depending on what information you have, the pt_in_poly function
might be useful in defining the mask.
Ansley
On 1/26/2017 9:48 AM, Melanie O' hanoly
wrote:
Hello Ferret Users..
I
have a temperature file of the globe for the 12 months.
I need to subtract 25% only from the region of Ecuador,
so I do some tests on my model, how do I do?
I tried, but I could not make another
file with globe and Ecuador 25% less,.
Can someone help me please?
Melanie O'Hanoly
PhD Student - Miami
University