[R] function return output

[David Winsemius]

On Jan 16, 2009, at 5:22 AM, threshold wrote:

>
> Hi, I wrote the function which outputs a matrix 'c' and a single  
> value 'd',
> as follows (simplified example):
> procedure <- function(a,b){
> ...
> list(c,d)
> }
> now I want to use 'c' and 'd' in code as follows:
> d <- matrix(0,1,1)
> value <- procedure(a,b)
> and d[1,1] <- value[2] breaks telling that:
> Error in d[1, 1] : incorrect number of dimensions
> What I did wrong??, best, robert

Who knows? No reproducible code.

The usual way of accessing just the second element of a list would be  
value[[2]]. value[2] will be a list that contains whatever was "d",  
rather than what was "d" in the procedure() call itself. It will not  
have the name "d". It is possible to use the same names inside and  
outside a function but it may be more clear for beginners to keep them  
separate.

-- 
David Winsemius