Provides all of the unique binary combinations for the
cov.lambda4 function. It should be noted that this
function does not provide all combinations but only ones
that are unique for the cov.lambda4 function. That is a
vector coded c(0,1,0,1) is equivalent to a vector
c(1,0,1,0) and only one of them is generated.
Usage
bin.combs(p)
Arguments
p
The number of items in the test.
Value
Function returns a matrix of binary combinations
coded as either -1 or 1.