[R] Subsetting from data.frame

[Göran Broström]

On Fri, 29 Nov 2002, Christian Schulz wrote:

> Hi,
>
> attach(data)
>
> if (TREUE[TREUE ==11] && EMPFEHL[EMPFEHL < 11])
> { TREUE <- EMPFEHL }
>
> what's wrong ( TREUE ==EMPFEHL works not,too )?

Use ifelse:

TREUE <- ifelse((TREUE == 11) & (EMPFEHL < 11), EMPFEHL, TREUE)

Note: & is the vectorizing 'AND'.

Göran
>
> many thanks & regards,Christian
>
>
>
>
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---
 Göran Broström                    tel: +46 90 786 5223
 Department of Statistics          fax: +46 90 786 6614
 Umeå University                   http://www.stat.umu.se/egna/gb/
 SE-90187 Umeå, Sweden             e-mail: gb at stat.umu.se


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