function z=circ(z0,r,n)
%function z=circ(z0,r,n)  returns points on circle with center z0, radius r
%Returns points on a circle with center: z0
%   and radius: r
%   n equally spaced points starting at z0+r 
%   are given.
%Example: axis('square')
%         plot(circ(1+i,2,50))
t=0:1/n:1;
z=z0+r*exp(i*2*pi*t);
