aperm {base}R Documentation

Array Transposition

Description

Transpose an array by permuting its dimensions and optionally resizing it.

Usage

aperm(a, perm, resize = TRUE)

Arguments

a the array to be transposed.
perm the subscript permutation vector.
resize a flag indicating whether the vector should be resized as well as having its elements reordered (default TRUE.)

Value

A transposed version of array a, with subscripts permuted as indicated by the array perm. If resize is TRUE, the array is reshaped as well as having its elements permuted; if FALSE then the returned object has the same dimensions as a, and the dimnames are dropped.
The function t provides a faster and more convenient way of transposing matrices.

See Also

t.

Examples

# interchange the first two subscripts on a 3-way array x
x  <- array(1:24, 2:4)
xt <- aperm(x, c(2,1,3))
stopifnot( t(xt[,,2]) == x[,,2] )