Given a matrix or `data.frame`

`x`

,
`t`

returns the transpose of `x`

.

`t(x)`

x

a matrix or data frame, typically.

A matrix, with `dim`

and `dimnames`

constructed
appropriately from those of `x`

, and other attributes except
names copied across.

This is a generic function for which methods can be written. The
description here applies to the default and `"data.frame"`

methods.

A data frame is first coerced to a matrix: see `as.matrix`

.
When `x`

is a vector, it is treated as a column, i.e., the
result is a 1-row matrix.

Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988)
*The New S Language*.
Wadsworth & Brooks/Cole.

`aperm`

for permuting the dimensions of arrays.

# NOT RUN { a <- matrix(1:30, 5, 6) ta <- t(a) ##-- i.e., a[i, j] == ta[j, i] for all i,j : for(j in seq(ncol(a))) if(! all(a[, j] == ta[j, ])) stop("wrong transpose") # }