How can I write a function that draws a regular polygon with n sides in a cartesian plot?

How can I write a function that draws a regular polygon with n sides and radius 1 in a cartesian plot?

Answer 1

[Steven Lord]

Use nsidedpoly to create a polyshape then plot that polyshape.

Answer 2

[Star Strider]

Easily, actually.

N = 5;                                              % Number Of Sides
a = linspace(0, 2*pi, N+1);                         % Angle Vector
r = 1;                                              % Radius Vector
phi = pi/4;                                         % Phase (Rotates Figure)
x = r*cos(a + phi);
y = r*sin(a + phi);

figure
plot(x, y,'-r', 'LineWidth',1.5)
axis equal

I assume that this is not homework.