[gradsusr] help required in using "maskout" function in grads

[Clark, Douglas B.]

Farah,

You need to have a variable that can be used to distinguish between land and sea points (e.g. a land/sea mask).
If the variable is called "land" and has values of 1 at land points, 0 over sea, and your precipitation variable is called "precip",
'd maskout(precip,land-0.5)'
will only show the land precipitation.

You can use a similar maskout construction as the argument to e.g. aave.

In any case, the second argument to maskout has to evaluate to <0 over sea, and >=0 over land.

Doug


From: gradsusr-bounces at gradsusr.org [mailto:gradsusr-bounces at gradsusr.org] On Behalf Of Farah Ikram
Sent: 18 July 2012 13:00
To: gradsusr at gradsusr.org
Subject: [gradsusr] help required in using "maskout" function in grads

i am trying to mask the data of sea precipitation in  my calculations. please tell me how to use 'maskout" function in for this.
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