You should probably convert Group to factor like
data$Group <- factor(data$Group)
the you can subset using
data[data$Group == "1", ]
or you can use tapply
Kjetil Halvorsen
yiping.fan at syngenta.com wrote:>
> Hello, all,
> I have a question regarding data input. For example: I have a file
like
> this
> Group exp value
> 001 1 1 5
> 002 1 2 4
> 003 1 3 4
> 004 2 1 4
> 005 2 1 4
> 006 3 2 3
> 007 3 4 5
> 008 3 4 5
> 009 3 5 6
> I read it using
> f<-read.table("infile")
> we have 3 groups here,
> group1 have 3 exps
> group 2 havs 2 exps
> group 3 has 4 exps
> After I read the file, how can I get the data for each group? Thanks!
>
> Yiping
>
>
>
>
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
> 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
>
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
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
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._