topic Re: Mean-differencing a Series in SAS Procedures

Mean-differencing a Series

ashraf — Tue, 07 Jul 2009 02:57:56 GMT

Greetings:

Is there a simple solution to calculate mean difference? That is, if I have series, say, X = x1, ..., xn. I can calculate difference of two values defining a new variable as:

d_X = dif(X);

What if I want to calculate the difference of each observation from the mean of the series? Is there a simple way to do this instead of calculating the mean and then subtracting it from each observation? That is, say,:

d_mX = (X - mean(X));

I am sure there is one, I just cannot find the command. (By the way, "meandif" is not a valid command for this.)

I appreciate your help.

Best,

Mitu Message was edited by: ashraf

Re: Mean-differencing a Series

sbb — Tue, 07 Jul 2009 13:13:36 GMT

Suggest searching the SAS support http://support.sas.com/ using the website SEARCH facility or possibly using a Google advanced search argument (sample below):

mean difference site:sas.com

Scott Barry
SBBWorks, Inc.

Re: Mean-differencing a Series

ashraf — Tue, 07 Jul 2009 15:47:23 GMT

Thanks Scott. One solution that I found late last night was STDIZE procedure.

Mitu