[ferret_users] masking area

[DELCLAUX Francois <francois.delclaux@xxxxxxxxxxxxxxxxxxx>]

Hi Ferret users,
I would like to compute  spatial and temporal average rainfall on a 
watershed.
The watershed is  a  (x,y) netcdf file (variable bv) (0 outside the 
basin, 1 inside the basin)
Rainfall field is a (x,y,t) netcdf file, (variable rain) with same 
spatial resolution as watershed.
So I have supposed that mutiplying rain by bv, I would get a rainfall 
field inside the wathershed.
But Ferret does not accept to multiply a (x,y) variable by a (x,y,t) 
variable.

In ferret documentation, masking  areas are defined from 3d fields, so 
multiplication
are possible. But not in my case.

How can I do this quite simple operation ?

Thanks in advance.
--
Francois DELCLAUX
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UMR HydroSciences Montpellier
Universite Montpellier II - Place Eugene Bataillon
Case courrier MSE
34095 Montpellier Cedex 5 FRANCE
http://www.hydrosciences.org/
mailto: delclaux@msem.univ-montp2.fr
Tel : (33) (0)4 67 14 90 11 Fax : (33) (0)4 67 14 47 74
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