[gradsusr] how to compute standard deviation in grads

[Hosmay Lopez]

Hi Amina,

I f your precipitation variable is named precip, then you could do:

Precip_StDev = sqrt(ave(pow(precip , 2), t = 1 , t = nt))

where, sort function is the square root
ave function is average over time dimension in this case.
pow function is the power function to square precip variable.

Hope this helps.

Hosmay Lopez
UM/CIMAS/RSMAS NOAA/AOML/PHOD
4301 Rickenbacker Causeway,
Miami, FL 33149, USA
Phone: (305) 361-4329

________________________________
From: gradsusr-bounces at gradsusr.org [gradsusr-bounces at gradsusr.org] on behalf of Amina Khan [k.amina93 at yahoo.com]
Sent: Monday, August 31, 2015 1:35 PM
To: gradsusr at gradsusr.org
Subject: [gradsusr] how to compute standard deviation in grads

Hi all,
I want to compute standard deviation from nc file having precipitation data.
There are also some undefined values in file. How can i do this. Please guide me.


Thanks
Amina

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