Introduction - If you have any usage issues, please Google them yourself
function circle(cx, cy, r, linetype)
N = 150
x = zeros(1,N+1)
y = zeros(1,N+1)
for n=1:N+1
x(n) = cx + r*cos(2*pi*n/N)
y(n) = cy + r*sin(2*pi*n/N)
end
hold on plot(x, y, linetype) hold off