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st: RE: rowmean within a loop


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: rowmean within a loop
Date   Mon, 22 Jun 2009 12:02:37 +0100

The intent of the code you give is difficult to understand. It commits
you to generating 20000 new variables, s1-s10000 and u1-u10000, which I
doubt is what you really want. 

egen v`i' = rowmean(u`i') 

within a loop is just going to put the rowmean of one variable (that
variable, identically) in another variable, which is pointless. 

Do start again from the beginning: 

1. Explain your data. 

2. Explain your problem. 

Nick 
n.j.cox@durham.ac.uk 

Carlo Lazzaro

after typing 

qui forval i =1/10000  {
qui g double s`i' = Surv_Pos_IFI[`i']*(1-Monthly_Pr_Death_AML_MDS_Prob)
in 1
replace s`i' = s`i'[_n-1]*(1-Monthly_Pr_Death_AML_MDS_Prob) if s`i'==.
qui g double u`i' = s`i'*LYS
}

I would like to obtain a variable where I can store the rowmeans for all
the
u`i'.

I tried unsuccessfully to use egen v`i'=rowmean(u`i'), but this way I
(obviously, I would suppose) get v`i' for each u`i', and this not help
the
achievement of my research purpose.

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