t {base} | R Documentation |
Given a matrix or data.frame
x
,
t
returns the transpose of x
.
t(x)
x |
a matrix or data frame, typically. |
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.
A matrix, with dim
and dimnames
constructed
appropriately from those of x
, and other attributes except
names copied across.
The conjugate transpose of a complex matrix A
, denoted
A^H
or A^*
, is computed as Conj(t(A))
.
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.
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")