On 14.01.2011 19:25, Jonathan Hughes wrote:
Hello,
Here's my problem. I have a large data frame and a vector with some of its row
names. I'd like to have a new data frame only with those rows that match this
vector of row names.
I tried this:
data<-cbind(c(1,2,3,4,5,6),c(2,3,4,5,6,7))
rownames(data)<-c("a", "b", "c","d","e","f")
names.to.keep<-c("a", "c", "d")
rows.to.keep<-which(rownames(data)==names.to.keep)
replace the last line by
rows.to.keep <- data[names.to.keep,]
and please read the docs on indexing.
Best,
Uwe Ligges
But it didn't work. Any suggestions?
thanks a lot.
Jonathan.
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