Hi

I have the feeling, that the argument stringsAsFactors has no impact in the
function expand.grid:

a <- c("PR", "NC", "A2", "BS")
b <- c(1, 0.5, 0.25, 0.125, 0.0625, 0.03125)

class(expand.grid(css, fscs, stringsAsFactors=FALSE)[[1]])
[1] "factor"
class(expand.grid(css, fscs, stringsAsFactors=TRUE)[[1]])
[1] "factor"

Also, when I look at the code of expand.grid,  stringsAsFactors does not
occur in the code.

Am I missing something?

> version
               _
platform       i486-pc-linux-gnu
arch           i486
os             linux-gnu
system         i486, linux-gnu
status
major          2
minor          9.0
year           2009
month          04
day            17
svn rev        48333
language       R
version.string R version 2.9.0 (2009-04-17)

Cheers,

Rainer
-- 
Rainer M. Krug, Centre of Excellence for Invasion Biology, Stellenbosch
University, South Africa

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