function H = besselh(n,x)
%BESSELH Integer order Hankel functions.
%       BESSELH(n,X) = Hankel function, H(1)-sub-n (X).
%       Hankel functions, also known as Bessel functions of the
%       third kind, are complex solutions to Bessel's differential
%       equation of order n:
%                2                    2   2
%               x * y''