[R] Fastest way to merge matrix columns into a comma delimited string?

[Jonathan Greenberg]

Folks:

Say I have a matrix:

test=matrix(c(1,2,3),nrow=10,ncol=3)

I would like to have an output character vector where each line is
row's values delimited by commas, e.g.:

"1,2,3"
"2,3,1"
"3,1,2"
...
"1,2,3"

What is the fastest way of doing this?  I can paste() row-by-row but
this seems an inefficient approach to doing this.  Thanks!  I'm not
asking how to write a CSV file, mind you, I want the array as an R
data.frame or vector.

--j