How do I convert spirographic values for r, R, and a to the code for a polar plot?

1 view (last 30 days)
I'm trying to create a polar plot using the radius of a large circle, a small circle, and the distance from the center of the small circle to the drawing point. I don't know how these values relate to what is used in a MATLAB code.

Accepted Answer

Star Strider
Star Strider on 6 Dec 2015
If you want to plot a hypotrochoid, you do not need a polar plot. This code uses a Cartesian plot:
A = 5.0;
B = 0.5;
d = 2.0;
t = linspace(0, 2*pi, 500);
x=(A-B)*cos(t)+d*cos((A-B)/(B)*t);
y=(A-B)*sin(t)-d*sin((A-B)/(B)*t);
figure(1)
plot(x, y, '-r')
grid
axis equal
to produce this figure:

More Answers (0)

Categories

Find more on Polar Plots in Help Center and File Exchange

Products

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!