[R] taking rows from a data frame

[Jim Lemon]

Lei Jiang wrote:
>
> ...Here is my problem. I have a data frame by read.table(). I want to 
> take every row from this data frame and compute the correlation between
> the current row and a fixed vector. finally I want to append the
> correlation computed as a column to the data frame.

This might do what you want.

fixvec<-c(2,4,3,5,4,6,5,7,6,8)
test.df<-data.frame(matrix(sample(1:9,100,replace=T),ncol=10))
test.df<-data.frame(test.df,cors=apply(as.matrix(test.df),1,cor,fixvec))

Jim
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