search for: sdvec

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1998 Oct 16
3
mean and sd of each serial position
..., a2, and a3. so in this example it would have the contents 4.041452, 4.041452, 2.081666 Can anyone tell me a good way to do this in R? The only thing I can come up with is meanvec<-function(a1,a2,a3) { temp<-numeric(3) for(i in 1:3) temp[i]<-mean(c(a1[i],a2[i], a3[i])) return(temp) } sdvec<-function(a1,a2,a3) { temp<-numeric(3) for(i in 1:3) temp[i]<-sd(c(a1[i],a2[i], a3[i])) return(temp) } If this simple-minded approach is the way to go, I wonder how to modify these functions so I don't need to know the number of vectors ahead of time. That is, make the same function...