[R] Base function for flipping matrices

Hans W Borchers hwborchers at googlemail.com
Sat Dec 31 17:18:49 CET 2011

Hadley Wickham <hadley <at> rice.edu> writes:


See functions flipud(), fliplr() in package 'matlab' (or 'pracma').
Those are the names of corresponding functions in MATLAB.

Hans Werner

> 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

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