[R] how to generate matrices based on an indicator variable

Hi, I am trying to create matrices X's based on one indicator variable, r. Given a 4 x4 matrix X= [ 0,0,0,0 0,0,0,0 0,0,0,0 0,0,0,1] r= c(0, 0, 0, 1) I'd like to create

Re: [R] how to generate matrices based on an indicator variable

This produces a list whose ith element is matrix Xi : X4 - replace(matrix(0, 4, 4), cbind(4, 4), 1) lapply(1:4, function(i) replace(X4, cbind(i,i), 1)) On 10/4/06, Ya-Hsiu Chuang [EMAIL PROTECTED] wrote: Hi, I am trying to create matrices X's based on one indicator variable, r. Given a 4