This function computes the direct sum of two arrays. The arrays can be
numerical vectors or matrices. The result ia the block diagonal matrix.
Usage
x%s%y
Arguments
x
a numeric matrix or vector
y
a numeric matrix or vector
Details
If either f{x} or y is a vector, it is converted to a matrix. The result
is a block diagonal matrix ≤ft[ {egin{array}{*{20}c}
{f{x}} & {f{0}} \
{f{0}} & {f{y}} \
end{array}}
ight].