[R] charactor matrix convert to numeric matrix

jim holtman
Wed, 02 Jun 2010 13:35:58 -0000

try this:

>
a<-cbind(c("23","54","65"),c("1","2","3"))
> a
     [,1] [,2]
[1,] "23" "1"
[2,] "54" "2"
[3,] "65" "3"
> mode(a) <- 'numeric'
> a
     [,1] [,2]
[1,]   23    1
[2,]   54    2
[3,]   65    3
>


On Wed, Jun 2, 2010 at 8:15 AM, Yuan Jian <jayuan2008 at yahoo.com>
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
>
>
>
>
>
>
> ? ? ? ?[[alternative HTML version deleted]]
>
>
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--
Jim Holtman
Cincinnati, OH
+1 513 646 9390

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