[R] extract a row

[Kevin Bartz]

The easiest way to do that is

subset(dataframe, rate == "slow").

Please let me know if you have any more questions.

Kevin

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Randy Zelick
Sent: Monday, August 16, 2004 10:49 AM
To: R list server posting
Subject: [R] extract a row

Hello there,

Using 1.9.0 on WinXP...

I have a data frame, one column of which is named "rate". The column has
text entries like "fast", "medium", "slow", "very slow", and so forth. I
have not tried to make them factors, but maybe R did this automatically.

Anyway, I would like to display on the console rows that meet a rate
criterion.

So I want to type something like:

dataframe[rate=="slow"]

and get back this sort of output:

test  subject  trial  rate  score

 34    B27      3     slow   27
 55    B55      4     slow   34

where test, subject, trial, rate, and score are all the
dataframe's columns.

How do I do that??

Thanks,

=Randy=


R. Zelick				email: zelickr at pdx.edu
Department of Biology			voice: 503-725-3086
Portland State University		fax:   503-725-3888

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