Hi Jian,

Try

matrix(as.numeric(a), ncol = 2)

HTH,
Jorge


On Wed, Jun 2, 2010 at 8:15 AM, Yuan Jian <> wrote:

> 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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>
>
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