On Feb 23, 2010, at 6:04 AM, Knut Krueger wrote:
Hi to all,
test <- data.frame("X"=c(1:4),"Y"=c(5:8),"Z"=c(8:11))
test <- test[,-2]
Is there a way to specify the col name "Y" to delete instead the
number?
I believe that negative indexing only works with numeric arguments.
You could dummy up a negation approach for character vectors with:
> test[, !(names(test) %in% c("Y"))] #non-negated logical vector to
index
X Z
1 1 8
2 2 9
3 3 10
4 4 11
> test[, -grep("Y",names(test))] # negated numeric vector to index
X Z
1 1 8
2 2 9
3 3 10
4 4 11
--
David
Kind regards Knut
______________________________________________
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.
______________________________________________
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.
