[R] applying max elementwise to two vectors

[Afshartous, David]

thanks all.  yes, pmax(x,y) gets it straight away.  sorry for missing
this
when I checked the docs. 

-----Original Message-----
From: Greg Snow [mailto:Greg.Snow at intermountainmail.org] 
Sent: Thursday, June 28, 2007 5:26 PM
To: Afshartous, David; r-help at stat.math.ethz.ch
Subject: RE: [R] applying max elementwise to two vectors

Are you looking for pmax? (look at the help ?pmax and the examples and
see if that does what you want).

--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at intermountainmail.org
(801) 408-8111
 
 

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Afshartous, 
> David
> Sent: Thursday, June 28, 2007 2:20 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] applying max elementwise to two vectors
> 
> 
>  
> All,
> 
> Is there one liner way to obtain the max per observation for two 
> vectors?
> I looked at apply and lapply but it seems that groundwork would have 
> to be done before applying either of those.  The code below does it 
> but seems like overkill.
> 
> Thanks!
> Dave
> 
> x = rnorm(10)
> y = rnorm(10)
> 
> ind = which(x < y)
> z = x
> z[ind] <- y[ind]  ## z now contains the max's
> 
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