[ferret_users] Replace one/several points in dataset

[Laurie Menviel <menviel@xxxxxxxxxx>]

Hi 

Using ferret I read a dataset, regrid it but before saving it I need to replace a few points manually. 
For example I need to set the sst value at grid point i=1,j=1 to the sst value at grid point i=2,j=1. 

like
sst[i=1,j=1]=sst[i=2,j=1]
sst[i=10,j=10]=sst[i=10,j=9]
or
sst[i=10,j=8]=1d-34 (undefined value)

Is it possible to perform such an operation with ferret?

Thank you
Best wishes,

Laurie