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2010 Dec 09
1
order matrix by column position
Hello all, I'm trying to grasp a way to order a matrix by giving order() only a vector of the columns it can look to for sorting. The approach has to be generic such that I can feed order() a vector of variable length (ie varying # of columns to sort by). x<-rep(1,9) y<-c(1, 1, 2, 2, 2, 1, 2, 2, 2) z<-c(10, 11, 10, 13, 15,1000,1000, 1001,1002) results<-cbind(x,y,z) #pseudocode: