[R] Turn categorical array into matrix with dummy variables

xuan zhao xuan.zhao at sentrana.com
Fri Jul 27 19:32:54 CEST 2012

Hi All,
I want to turn a categorical array (array with factors) into a matrix with
dummy variables. like array=c(a,a,b,b,b) should be turned into:
a b
1 0
1 0
0 1
0 1
0 1
Do you know any way of doing this? 

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