[R] Odp: charactor matrix convert to numeric matrix

Petr PIKAL
Wed, 02 Jun 2010 13:37:38 -0000

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-bounces at 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
>
>
>
>
>
>
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