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List:       r-help
Subject:    Re: [R] Base function for flipping matrices
From:       William Revelle <lists () revelle ! net>
Date:       2011-12-31 21:59:50
Message-ID: C13ACBDA-FDBA-411A-9F8E-B5DC427D4C08 () revelle ! net
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Hadley,
 Presumably for fliplr you meant ncol(x)

fliplr <- function(x) x[, ncol(x):1]

Bill


On Dec 31, 2011, at 9:08 AM, Hadley Wickham wrote:

> Hi all,
> 
> Are there base functions that do the equivalent of this?
> 
> fliptb <- function(x) x[nrow(x):1, ]
> fliplr <- function(x) x[, nrow(x):1]
> 
> Obviously not hard to implement (although it needs some more checks),
> just wondering if it had already been implemented.
> 
> Hadley
> 
> -- 
> Assistant Professor / Dobelman Family Junior Chair
> Department of Statistics / Rice University
> http://had.co.nz/
> 
> ______________________________________________
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William Revelle		           http://personality-project.org/revelle.html
Professor			           http://personality-project.org
Department of Psychology   http://www.wcas.northwestern.edu/psych/
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