[R] transforming a matrix of logical to 0 and 1 while keeping the dim of matrix
Sarah Goslee
sarah.goslee at gmail.com
Wed Jul 20 17:27:40 CEST 2011
How about this:
> x<-matrix(c(TRUE,FALSE,TRUE,FALSE,TRUE,FALSE,TRUE,FALSE,TRUE),nrow=3)
> x
[,1] [,2] [,3]
[1,] TRUE FALSE TRUE
[2,] FALSE TRUE FALSE
[3,] TRUE FALSE TRUE
> ifelse(x, 1, 0)
[,1] [,2] [,3]
[1,] 1 0 1
[2,] 0 1 0
[3,] 1 0 1
Sarah
On Wed, Jul 20, 2011 at 11:16 AM, Julian TszKin Chan <cjulian at bu.edu> wrote:
> Hi all,
>
> Suppose I have a matrix of logical value:
>
> x<-matrix(c(TRUE,FALSE,TRUE,FALSE,TRUE,FALSE,TRUE,FALSE,TRUE),nrow=3)
>
> I would like to change the value of FALSE to 0 and TRUE to 1. An
> obvious way to do it is :
> y<-as.numeric(x)
>
> However this method doesn't keep the dim of x. I also need to copy the
> dim information to y too.
> attributes(y)<-attributes(x)
>
> Is this a correct way to do it in R? Is there any single step function
> which can do the something? Thanks
>
>
> Regards,
> TszKin Julian
>
--
Sarah Goslee
http://www.functionaldiversity.org
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