[R] Quick question!

Mark Myatt mark at myatt.demon.co.uk
Wed Oct 31 15:56:48 CET 2001

Isabel Jones <statsonthebrain at yahoo.com> writes:

>Just a further quick question:
>If I have this:
>for(i in 1:n) {
>  subset <- data[which(data$id==i),]
>which returns the rows where I have the variable ID=1,
>how can I tell the same statement to return just
>column Y where ID=i?

The subset() function does this:

        For(i in 1:n) {
                ss <- subset(data, id == i, Y)


Mark Myatt

r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch

More information about the R-help mailing list