[R] extract a row

[Adaikalavan Ramasamy]

df[ df$rate==slow, ]


On Mon, 2004-08-16 at 18:48, Randy Zelick wrote:
> 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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