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Posted: **Mon Aug 10, 2015 8:11 am**

Consider three monthly time series Y, X and Z from January to August 2015.

I am interested in computing the monthly standard deviation among Y, X and Z and then plot the resulting time series.
It is a standard deviation among three numbers for each month.

How do you program it with Eviews 8? Best.

Posted: **Mon Aug 10, 2015 8:30 am**

Put them in a group and then use the @rstdev function.

Posted: **Mon Aug 10, 2015 10:28 am**

Thank you.

This provides the standard deviation based on a sample (i.e. N-1).

Is it possible to compute the standard deviation basen on the entire populations (i.e. N)?

Posted: **Mon Aug 10, 2015 10:44 am**

A 5 second search in the documentation reveals:

: 2015-08-10_104306.png (27.11 KiB) Viewed 3266 times

EViews.com

Time varying standard deviation across variables

Time varying standard deviation across variables

Re: Time varying standard deviation across variables

Re: Time varying standard deviation across variables

Re: Time varying standard deviation across variables