On Tue, 31 May 2005, Duncan Murdoch wrote:
M�kinen Jussi wrote:
Dear All,
I luckily found the following feature (or problem) when tried to apply
ifelse-function to an ordered data.
test <- c(TRUE, TRUE, TRUE, FALSE, FALSE, FALSE, FALSE)
ifelse(test, 0, 1:4)
[1] 0 0 0 4 1 2 3
<snippage>
As Dimitris said, this is just recycling. I think getting rid of recycling
on vectors with length greater than 1 would have been a good decision in S
about 15 years ago, but it's too late now.
It wouldn't help the original poster, though. I agree that 0,0,0,4,1,2,3
is a slightly weird result, but I can't think of any reasonable model for
the behaviour of ifelse() that would give any other result except an error
message. [or 0,NA,NA,4,NA,NA,NA, I suppose].
-thomas
______________________________________________
[email protected] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
