Try this:
z = input('Enter complex number ')
n = input('Enter degree of root ')
P = -1;
P(n+1) = z;
r = roots(P)
mag = abs(r);
phs = angle(r);
figure(1)
polarplot(phs, mag, 'p')
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!