How do I plot Sinusoidal wave over a circle in Matlab?

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loyyy
loyyy 2022-2-22
评论： loyyy 2022-3-10

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Arthur Reis
Arthur Reis 2022-2-22
I'm not sure if I 100% understood your question, but here it is
t = 0:0.01:2*pi; %define interval
x = cos(t);
y = sin(t);
figure;
plot(x,y); %normal circle
%%
f = 10; %define modulation frequency
A = .2; % modulation amplitude
R = A*cos(f*t); %
x = cos(t) + R;
y = sin(t) + R;
figure;
plot(x,y); %similar to your example
%%
x = cos(t).*(1 + R);
y = sin(t).*(1 + R);
figure;
plot(x,y); %modulating the radius
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Arthur Reis
Arthur Reis 2022-3-7
Hello,
you'll only need to change the definition of the 't'. You can use linspace to get an linearly spaced array with expecific number of points (120 in this case). So:
tp = linspace(0,2*pi,120); %new array
xp = cos(tp);
yp = sin(tp);
f = 10; %define modulation frequency
A = .2; % modulation amplitude
Rp = A*cos(f*tp); %
zp = Rp;
figure;
scatter3(xp,yp,zp);
Their coordinates are xp, yp, zp.
Does this solve your problem?

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