Dear Jörg,
Try this:

# Data
DF=read.table(textConnection("
row1    row2    row3
x               2               3
x               1               4
y               5               3
y               2               3"),header=TRUE)
closeAllConnections()

# Splitting
res=with(DF,split(DF,row1))
res


# To access the first data.frame just type
res$x

See ?split for more details.


HTH,

Jorge



On Mon, Dec 15, 2008 at 8:43 PM, Jörg Groß <joerg@licht-malerei.de> wrote:

> Hi,
>
> I have a data frame with several columns.
>
> Now I want to transfer the data into a new variable (also a data frame),
> but I only want a part of the data, defined by a rule ...
>
>
> for example; I have following data frame:
>
> row1    row2    row3
> x               2               3
> x               1               4
> y               5               3
> y               2               3
>
> I know want a data frame, only with lines containing x in row1.
>
> I know how to do that for one row    (f <- d$row2[d$row1=="x"]).
> But how can I do that for all rows in one step?
>
>
> So that I get this for f:
>
> row1    row2    row3
> x               2               3
> x               1               4
>
> ______________________________________________
> 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.
>

	[[alternative HTML version deleted]]

