Rachel -
Not exactly a reproducible example, but maybe
t1 <- subset(nih2009, ic_name %in% levels(nih2009$ic_name)[c(27,51)])
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spec...@stat.berkeley.edu
On Tue, 22 Jun 2010, Hayes, Rachel M wrote:
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
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