Subsetting from data.frame

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'.

G?ran

many thanks & regards,Christian




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---
 G?ran Brostr?m                    tel: +46 90 786 5223
 Department of Statistics          fax: +46 90 786 6614
 Ume? University                   http://www.stat.umu.se/egna/gb/
 SE-90187 Ume?, Sweden             e-mail: gb at stat.umu.se


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Hi,

 | From: "Christian Schulz" <ozric at web.de>
 | Date: Fri, 29 Nov 2002 09:49:44 +0100
 | 
 | Hi,
 | 
 | attach(data)
 | 
 | if (TREUE[TREUE ==11] && EMPFEHL[EMPFEHL < 11])
 | { TREUE <- EMPFEHL }
 | 
 | what's wrong ( TREUE ==EMPFEHL works not,too )?
 | 
 | many thanks & regards,Christian

can you please give us more information?

I think what you want is

ind <- (TREUE == 11) & (EMPFEHL < 11)
TREUE[ind] <- EMPFEHL[ind]

Have you read about indexing, if and ifelse, & and &&?

Regards,

Ott
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Hi,

attach(data)

if (TREUE[TREUE ==11] && EMPFEHL[EMPFEHL < 11])
{ TREUE <- EMPFEHL }

what's wrong ( TREUE ==EMPFEHL works not,too )?

many thanks & regards,Christian

Neither if() nor "&&" works vectorized, use ifelse() and "&" instead
(see the help pages for details).

Uwe Ligges
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