[R] compute new variable

[Chuck Cleland]

Matthias von Rad wrote:
> Hello,
> maybe my question ist stupid, but I would like to calculate a new  
> variable for all cases in my dataset. Inspired by the dialog in Rcmdr  
> I tried
> Datenmatrix$cohigha<- with(Datenmatrix,mean (c(M2ORG, M5ORG, M8ORG,  
> M11ORG), na.rm = TRUE)
> as output I got the same number for all my cases (possibly the  
> overallmean of all cases), instead of a mean for each case.
> Can you help me with this problem?

Datenmatrix$cohigha <- rowMeans(Datenmatrix[,c("M2ORG", "M5ORG",
"M8ORG", "M11ORG")], na.rm=TRUE)

> regards
> Matthias
> 
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Chuck Cleland, Ph.D.
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