本文介绍了信号是否周期性?使用MATLAB函数可能吗?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
使用MATLAB函数简要说明信号(非)周期性的原因
Briefly explain the reason for the (non)periodicity of a signal using MATLAB functions
像等距(信号)...
like isperiodic(signal) ...
像这样的东西吗?
推荐答案
fft 可以做到:
Y = fft(signal);
periodLength = 'second'; %or whatever units your signal was acquired in.
N = length(Y);
Y(1) = [];
power = abs(Y(1:floor(N/2))).^2;
nyquist = 1/2;
freq = (1:floor(N/2))/floor(N/2)*nyquist;
figure;
plot(freq,power)
grid on
xlabel(['cycles/' periodLength]);
title('Frequency plot');
这就是每个周期的周期数.
and this gives it as number of periods per cycle.
period = 1./freq;
figure;
plot(period,power)
grid on
ylabel('Power')
xlabel(['Period (' periodLength 's/Cycle)']);
title('Period Plot');
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