[R] convert characters into integers in a matrix

From: Manisha Brahmachary <mb3058_at_c2b2.columbia.edu>
Date: Tue, 10 Jun 2008 14:28:35 -0400


Hello,  

I will appreciate any suggestion for this simple problem. I have a matrix of characters "A", "P", "M".  

I want to convert those characters to integers 0,1, 1 respectively. I am using the following R statements:  

exprs.new<-gsub("P",1,exprs)

 exprs.new1 <- gsub("A",0,exprs.new)

 exprs.new2 <- gsub("M",1,exprs.new1)  

The replaced integers are stored as characters and I cannot find a way to convert the matrix to an integer matrix.  

Thanks

manisha  

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