R help - Nov 2007 - Recycling Rule

Hi, I have an efficiency question.

To centralise a dataset (in a data frame) I have been using:

a <- mean(Data)
Data <- t(t(Data)-a)

...to force row-wise recycling.

Is there a better/more efficient/more elegant way than transposing the dataset
twice?

Thanks
	[[alternative HTML version deleted]]

?scale or ?sweep or ?lapply

-- 
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 r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Mark Deacon
> Sent: Friday, November 09, 2007 6:47 AM
> To: r-help at stat.math.ethz.ch
> Subject: [R] Recycling Rule
> 
> Hi, I have an efficiency question.
> 
> To centralise a dataset (in a data frame) I have been using:
> 
> a <- mean(Data)
> Data <- t(t(Data)-a)
> 
> ...to force row-wise recycling.
> 
> Is there a better/more efficient/more elegant way than 
> transposing the dataset twice?
> 
> Thanks
> 	[[alternative HTML version deleted]]
> 
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