Hi All,
I have a factor variable with 52 levels -with long, annoying names. I want to
keep only rows with some variables. I can do this using this code:
test1 <- subset(nih2009,ic_name %in% c('NATIONAL EYE INSTITUTE','Veterans
Affairs'))
dim(test1)
[1] 2396 38
But this doesn't work:
t1 <- subset(nih2009, ic_name %in% c(27,51))
dim(t1)
[1] 0 38
I know there's a way to do this. Any help? Thanks,
Rachel
[[alternative HTML version deleted]]
______________________________________________
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.
