[gradsusr] define a field from existing field

[Jian-Jian Wang]

Thank you!  I have figured it out with maskout and const functions. -- Jay

On Sep 29, 2014, at 9:39 PM, Julio Martinez wrote:

> Check out maskout and const functions
> 
> Enviado desde mi iPad
> 
>> El 29/09/2014, a las 20:38, "Jian-Jian Wang" <jjwang at umd.edu> escribió:
>> 
>> Hi,
>> 
>> I have an existing field, "sat_rain" , and would like to define a new field "sat_detect", making it to be constant of 1 if sat_rain > 0.
>> I tried:
>> 
>> if (prec > 0) define sat_detect = 1
>> 
>> sat_detect = if(prec,>,0,2,-a)
>> 
>> none of them works.  Would you please provide some advice?
>> Thank you in advance. 
>> 
>> Jay
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