Hello again, I was too quick before. What I was looking for was a function that constructs the design (or incidence) matrix (X in a linear model) from a factor. Uwe Ligges suggested using model.matrix and this does almost what I want, but it is first necessary to construct a data variable. It also asigns ones to all rows of the first column (because this is set to be the contrast, not really what I want - see below). Maybe time for a function that just converts a factor into a design matrix?
I have a factor factor<-as.factor(c(1,1,2,2,3,3,3)) and I want a matrix 1 0 0 1 0 0 0 1 0 0 1 0 0 0 1 0 0 1 0 0 1 Patrik Waldmann########################################### This message has been scanned by F-Secure Anti-Virus for Microsoft Exchange. ########################################### ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
