topic Re: Centering variables in SAS Procedures

Centering variables

PTD_SAS — Mon, 06 Oct 2014 05:15:55 GMT

Could I get some help on how to create centered values of variables in a dataset? In the attached example I'd like to calculate the grand mean for score1 and score2 and then subtract each value of score1 and score2 from their corresponding grand mean. I need to do this on a grand scale for many variables so I suppose it's an exercise in how to merge the raw data with the grand means of each variable. Or, is there a statistical procedure that can do it?

Thanks!!

Re: Centering variables

KachiM — Mon, 06 Oct 2014 06:16:15 GMT

This can be easily done using double do-loops. No procedure is needed. It is just adding the values of the variable with simultaneous count in the first do-loop and finding the deviations

from the mean in the second do-loop.

I am unable to read your attached data set because of version difference. If you are interested, show a sample data in a readable form like datalines.

Best of luck.

Muthia Kachirayan

Re: Centering variables

Reeza — Mon, 06 Oct 2014 06:42:39 GMT

There's a proc for that :-), Look up proc standardize and stdize

Edit: in your case you want stdize with method= mean.

Re: Centering variables

PTD_SAS — Mon, 06 Oct 2014 23:41:27 GMT

Thank you Reeza, saved me a lot of time!