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$x
See ?split for more details.
HTH,
Jorge
On Mon, Dec 15, 2008 at 8:43 PM, Jörg Groß <[email protected]> wrote:
> Hi,
>
> I have a data frame with several columns.
>
> Now I want to transfer the data into a new variable (also a data frame),
> but I only want a part of the data, defined by a rule ...
>
>
> for example; I have following data frame:
>
> row1 row2 row3
> x 2 3
> x 1 4
> y 5 3
> y 2 3
>
> I know want a data frame, only with lines containing x in row1.
>
> I know how to do that for one row (f <- d$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
>
> ______________________________________________
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
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