How can I plot locus of a rotating phasor with time?

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VEDANT SONAR
VEDANT SONAR 2019-2-6
回答： Shunichi Kusano 2019-2-6
Hello! I want to plot the trajectory of a rotating vector of continuously changing magnitude. Please help me!!

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Shunichi Kusano
Shunichi Kusano 2019-2-6
This is a simple example. Plase change "A" and "theta" to what you like.
t = 0:0.01:10; % time
A = t.^2; % amplitude changing with time
theta = 2*pi*t; % phase (rotating)
plot(A.*cos(theta), A.*sin(theta), 'r.-'); % trajectory
hope this helps.
trajectory_example.jpg

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