How to make a polar plot function curve and not rigid?

Hello,

I'm not sure why but when I polarplot the graph is very rigid. does anyone know how to change it? I attached a picture and below is what i'm using;

theta = 0*pi: 0.1*pi: 2*pi;

r = 5*cos(4*theta);

polarplot(theta, r)

Answer 1

[Amir Xz]

Steps are so large.

theta = 0*pi: 0.01: 2*pi;

[Christian Jaramillo]

According to the textbook MatLab for Engineers, that's the array provided

[Walter Roberson]

0*pi: 0.1*pi: 2*pi is only 21 points, and it needs to cover all 8 nodes in that, so it averages less than 3 points per node. You need to use samples that are closer together, or else you need to interpolate between those 21 points (which could give you a quite misleading idea of what the curve looks like.)