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| From | "E. Paul Wileyto" <epw@mail.med.upenn.edu> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: Create a 'rolling-mean' variable |
| Date | Thu, 04 Nov 2010 12:32:17 -0400 |
Try this (if you have no missings): newvar=sum(oldvar)/_n P On 11/4/2010 12:17 PM, Léon Bueckins wrote:
Hi, this might be a rather simple questions, but I don't get it to work, so help is appreciated. I try to generate a variable that is simply the mean value of another up to this point in time, so a kind of rolling-mean. Example: var_x | var_mean 1| 1/1 4 | 5/2 3 | 8/3 7 | 15/4 2 | 17/5 Regards, Leon * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/
-- E. Paul Wileyto, Ph.D. Assistant Professor of Biostatistics Tobacco Use Research Center School of Medicine, U. of Pennsylvania 3535 Market Street, Suite 4100 Philadelphia, PA 19104-3309 215-746-7147 Fax: 215-746-7140 epw@upenn.edu * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/