Spheric to cylindric conversion matlab

%cylyndric: (radius ρ, azimuth φ,     elevation z)  (rho, alpha, z)       (r,   theta, z)
%spheric:   (radius r, azimuth φ,  inclination θ,)  (r,   alpha, epsilon) (rho, theta, phi)

function [rho, alpha, z] = mysph2cyl(varargin)
    switch nargin
        case 1
            Xi = varargin{1};
            [w,h] = size(Xi);
            rho = zeros(w, h);
            for i = 1:Xi
                point = Xi(:,i);
                [point(1), point(2), point(3)] =mysph2cyl(point(1), point(2),point(3));
                rho(:,i) = point;
            end
        case 3
            r = varargin{1};
            alpha = varargin{2};
            epsilon = varargin{3};
            %The other two are simple:
            rho = r*sin(epsilon);
            z = r*cos(epsilon);
    end
end