t                    package:base                    R Documentation

Matrix Transpose

Description:

     Given a matrix or 'data.frame' 'x', 't' returns the transpose of
     'x'.

Usage:

     t(x)

Arguments:

       x: a matrix or data frame, typically.

Details:

     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.

Value:

     A matrix, with 'dim' and 'dimnames' constructed appropriately from
     those of 'x', and other attributes except names copied across.

Note:

     The _conjugate_ transpose of a complex matrix A, denoted A^H or
     A^*, is computed as 'Conj(t(A))'.

References:

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

See Also:

     'aperm' for permuting the dimensions of arrays.

Examples:

     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")

