Hi you have several options
apply(a, 2, as.numeric) matrix(as.numeric(a),3,2) b<-as.numeric(a) dim(b)<-c(3,2) Regards Petr r-help-boun...@r-project.org napsal dne 02.06.2010 14:15:25: > Hello R experts, > can you tell me a simple way to convert a charactor matrix to numeric matrix? > if I use as.numeric, the matrix is converted to a vector. > > a<-cbind(c("23","54","65"),c("1","2","3")) > a > [,1] [,2] > [1,] "23" "1" > [2,] "54" "2" > [3,] "65" "3" > > as.numeric(a) > [1] 23 54 65 1 2 3 > > thanks > Jian > > > > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.