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

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Christian Jaramillo 2018-9-13

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评论： Walter Roberson 2018-9-14

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)

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Answer 1

Amir Xz 2018-9-13

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Steps are so large.

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

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Christian Jaramillo 2018-9-14

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

Walter Roberson 2018-9-14

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.)

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