R help - Feb 2008 - Split data.frames depeding values of a column

Hello to all
is there a function wich splits  a data.frame (column1,column2,column3,....)

into
data1 <-(column1,column3....) #column2 = 1
data2 <-(column1,column3....) #column2 = 2
data3 <-(column1,column3....) #column2 = 3
...
Regards Knut

try split(), e.g.,

dat <- data.frame(x = rnorm(12), y = runif(12),
    z = rep(1:4, 3))
dat
split(dat[1:2], dat$z)


I hope it helps.

Best,
Dimitris

----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
     http://www.student.kuleuven.be/~m0390867/dimitris.htm


----- Original Message ----- 
From: "Knut Krueger" <rh at family-krueger.com>
To: "'R R-help'" <r-help at stat.math.ethz.ch>
Sent: Tuesday, February 26, 2008 11:22 AM
Subject: [R] Split data.frames depeding values of a column

> Hello to all
> is there a function wich splits  a data.frame 
> (column1,column2,column3,....)
>
> into
> data1 <-(column1,column3....) #column2 = 1
> data2 <-(column1,column3....) #column2 = 2
> data3 <-(column1,column3....) #column2 = 3
> ...
> Regards Knut
>
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> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 

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