B = beta(Z,W)
B = beta(Z,W) computes
the beta function for corresponding elements of arrays
The arrays must be real and nonnegative. They must be the same size,
or either can be scalar.
In this example, which uses integer arguments,
beta(n,3) = (n-1)!*2!/(n+2)! = 2/(n*(n+1)*(n+2))
is the ratio of fairly small integers, and the rational format is able to recover the exact result.
format rat beta((0:10)',3) ans = 1/0 1/3 1/12 1/30 1/60 1/105 1/168 1/252 1/360 1/495 1/660