convert a matrix to binaryMatrix in Recommenderlab

Jing Xi

Thu, Aug 18, 2011 3:58 PM #

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11 days later

Michael Hahsler

Tue, Aug 30, 2011 3:54 PM #

Hi Jing

recommenderlab is still under heavy development and quite far away from 
version 1.0-0. Here is some code to create a binaryRatingMatrix from a 
0-1 matrix:

library(recommenderlab)

## create a 10x10 0-1 matrix
m <- matrix(sample(c(0,1),100, replace=TRUE), nrow=10, ncol=10)
m

## coerce it into a binaryRatingMatrix
b <- as(m, "binaryRatingMatrix")
b

## coerce it back to see if it worked
as(b, "matrix")

Hope this helps,
-Michael

Dr. Michael Hahsler, Visiting Assistant Professor
   Department of Computer Science and Engineering
   Lyle School of Engineering
   Southern Methodist University, Dallas, Texas

   (214) 768-8878 * mhahsler at lyle.smu.edu * http://lyle.smu.edu/~mhahsler