How can I plug complex numbers in function ?

I have complex circle. Its center is at (2,0) and radius=0.5. I am trying to plug all my domain in a function and trying to plot answer. I have written the code like this but it doesn't work.

theta=0:0.0001:2*pi;
r=0.5;
x=r*cos(theta)-2;
y=r*sin(theta);
s=complex(x,y);
g=(s-1)/((s.^3)+4*(s.^2)+7*s+6)

Answer 1

[Torsten]

theta=0:0.0001:2*pi;
r=0.5;
x=2+r*cos(theta);
y=r*sin(theta);
s=complex(x,y);
g=(s-1)./((s.^3)+4*(s.^2)+7*s+6);
plot(real(g),imag(g))

[madhan ravi]

@Torsten

x=r*cos(theta)-2;

I tried using the above why did it not produce the plot , just curious..

[Torsten]

x = 2 + r * cos(theta): for x = -2 + r * cos(theta), the center of the circle were at (-2,0) instead of (2,0).

The code from above does not work because

g=(s-1)/((s.^3)+4*(s.^2)+7*s+6)

instead of

g=(s-1) *.*/((s.^3)+4*(s.^2)+7*s+6)

[madhan ravi]

Ah I See now thank you @Torsten