Message-ID: <200905060512.AKQ01150@md4.mail.umd.edu>
Date: 2009-05-06T05:12:41Z
From: Daniel Malter
Subject: subset data
In-Reply-To: <4367cc950905052142j3d0e3a46m6b39b289c5008795@mail.gmail.com>
data[data$id==selected$id, ]
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cuncta stricte discussurus
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-----Urspr?ngliche Nachricht-----
Von: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] Im
Auftrag von abdul kudus
Gesendet: Wednesday, May 06, 2009 12:42 AM
An: r-help at r-project.org
Betreff: [R] subset data
Dear all,
> data <- data.frame(id=seq(1:10),x=runif(10))
> data
id x
1 1 0.3604464
2 2 0.4813987
3 3 0.0160058
4 4 0.7165909
5 5 0.6092248
6 6 0.2413049
7 7 0.7981568
8 8 0.6093960
9 9 0.2887064
10 10 0.3485780
> selected.id <- sample(data$id,3,replace=F) selected.id
[1] 9 7 1
I want to select data with corresponding selected.id, namely
> selected.data
id x
9 9 0.2887064
7 7 0.7981568
1 1 0.3604464
How to do?
Tq.
Abdul Kudus
Institute for Mathematical Research
Universiti Putra Malaysia
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