II am translating some gauss code into R, and gauss has a matrix
product function called the horizontal direct product (*~), which is
some sort of variant on the Kronecker product.
For example if x is 2x2 and y is 2x2
the horizontal direct product, z, of x and y is defined (in the Gauss
maybe something like:
%*~% - function(x, y){
n - nrow(x)
out - matrix(0, n, ncol(x) * ncol(y))
for(i in 1:n)
out[i, ] - c(y[i, ] %o% x[i, ])
out
}
x - matrix(1:4, 2, 2, TRUE)
y - matrix(5:8, 2, 2, TRUE)
x %*~% y
I hope it helps.
Best,
Dimitris
Dimitris
On Fri, 25 Aug 2006, Luke Keele wrote:
II am translating some gauss code into R, and gauss has a matrix
product function called the horizontal direct product (*~), which is
some sort of variant on the Kronecker product.
For example if x is 2x2 and y is 2x2
the horizontal direct product, z,
