bracket.prod {fastmatrix} | R Documentation |
Bracket product
Description
Bracket product of a matrix and a 3-dimensional array.
Usage
bracket.prod(a, x)
Arguments
a |
a numeric matrix. |
x |
a three-dimensional array. |
Details
Let be a 3-dimensional
array and
an
matrix, then
is called the bracket product of
and
, that is an
with elements
Value
bracket.prod
returns a 3-dimensional array of dimension .
References
Wei, B.C. (1998). Exponential Family Nonlinear Models. Springer, New York.
See Also
Examples
x <- array(0, dim = c(2,3,3)) # 2 x 3 x 3 array
x[,,1] <- c(1,2,2,4,3,6)
x[,,2] <- c(2,4,4,8,6,12)
x[,,3] <- c(3,6,6,12,9,18)
a <- matrix(1, nrow = 3, ncol = 2)
y <- bracket.prod(a, x) # a 3 x 3 x 3 array
y
[Package fastmatrix version 0.5-772 Index]