[gradsusr] Standard deviation in GrADS

[sudev das M P]

Hai all,

I am calculating standard deviation in grads using the following formula.

I  request you please tell me whether I am calculating sd in the right way.

Is there any other way to calculate sd in GrADS.
=============================================
define tave = ave(sst,t=1,t=12)
define sdsst = sqrt(ave(pow(sst-tave,2),t=1,t=12))
d sdsst
=============================================

Thanks,
sudev
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