function bessel

Returns the bessel function of X.

Syntax
result = bessel(X, kind, order)

Arguments

X:   A real number.

kind:   An integer number (1 or 2), specifying the kind of the bessel function to be computed.

order:   An integer number >= 0, specifying the order of the bessel function to be computed.

X:	A real number.
kind:	An integer number (1 or 2), specifying the kind of the bessel function to be computed.
order:	An integer number >= 0, specifying the order of the bessel function to be computed.