where function

Hallo NCL,

I have a simple question related "where" logic in NCL.

I have a data containing this information:
variable : float *alkali( conc, ionm)*
              "conc" extends from 1.0 to 100.0
              "ionm" extends from -10 to +10

i want to display only *alkali values* in specific range *conc|25:50 *
and*ionm|-5:5
*while the* rest values* outside the range, I want to replace with * zero "0
*".

I did something like this:

*alkali = where((alkali@ conc.ge.0.1 .and. alkali@conc.le.0.4 .and.
alkali@ ionm.ge.-1
.and. alkali@ionm.le.-10), alkali, 0)*
*
*
but, i got error message!

Thanks for your help.

Ahmad

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Received on Sun Jan 6 04:03:46 2013