Thanks
I eventually tracked down the problem to something unrelated to this
question (one out of the millions of character strings happened to be
"NA" by chance, which of course was parsed as a missing value, breaking
the code a long way downstream.....)
Richard
On 28/09/2010 04:01, Michael Bedward wrote:
Hello Richard,
Since no one else has answered yet I'll venture a guess.
The following works on my little macbook...
x<- as.factor(sapply(letters[1:26], function(x) paste(rep(x, 100000),
collapse="")))
So each of the 26 factor levels in x has a string representation of
100,000 chars. So I'm *guessing* the limit is only that imposed by
system memory.
Hopefully if that's wrong it will provoke someone to correct me :)
Michael
On 27 September 2010 19:15, Richard Mott<rm...@well.ox.ac.uk> wrote:
Hi
Is there a maximum length for the character string representing a level of a
factor? I have a set of several million variables, each a factor of length
19. Each factor level is a character string which in some cases can be many
thousands of characters long. I am trying to find out why my analysis fails
- I just wanted to rule out the possibility that the internal factor
conversion has a problem parsing long strings.
Thanks
Richard
--
----------------------------------------------------
Richard Mott | Wellcome Trust Centre
tel 01865 287588 | for Human Genetics
fax 01865 287697 | Roosevelt Drive, Oxford OX3 7BN
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
--
----------------------------------------------------
Richard Mott | Wellcome Trust Centre
tel 01865 287588 | for Human Genetics
fax 01865 287697 | Roosevelt Drive, Oxford OX3 7BN
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
