[R] How to convert a list to a matrix

Jean Eid jeaneid at chass.utoronto.ca
Thu Feb 3 16:50:09 CET 2005


list1 <- list(x=c(1,2), y=c(3,4), z=c(4,5))
matrix(unlist(list1), nrow=length(list1), byrow=T)

HTH

On Thu, 3 Feb 2005, michael watson (IAH-C) wrote:

> Hi
>
> Sorry to ask such a basic question.  I have a list, each element of
> which is a vector of two values.  What I actually want is a matrix with
> two columns, and one row per element of the list.  Obviously I have
> tried as.matrix(), and as.vector() but I didn't expect the latter to
> work.
>
> I feel so lame asking this.  Any suggestions?
>
> Mick
>
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