[R] Splitting a set of vectors in a list

Erik Iverson iverson at biostat.wisc.edu
Thu Mar 13 19:25:41 CET 2008


What would you want your output matrix to look like given mylist?

John Kane wrote:
> I have a set of character vectors of uneven length
> that I have stored in a list.  I can easily enough get
> any column of them  using lapply but what I want is to
> be able to create a matrix of them.  Other than some
> kind of brute force looping approach I have drawn a
> blank. 
> 
> Would somebody please suggest something? Thanks
>  
> Example.
> 
> mylist <- list(aa=c("cat","peach" ), bb=c("dog",
> "apple", "iron"), 
>          cc = c("rabbit", "orange", "zinc", "silk"))
> myfun <- function(dff) dff[1]       
> vect1  <- unlist(lapply(mylist, myfun))
> 
> 
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