Problems to compute a phase shift using sinusoidal functions

Question

Darryl 2013-11-16

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/106420-problems-to-compute-a-phase-shift-using-sinusoidal-functions

回答： Wayne King 2013-11-16

I am having problems trying to compute a phase shift using sinusoidal functions. For example I am trying to achieve this:

I can compute this giving it a vertical transition, but no matter where I add its incorrect when plotted along side the above equation without the phase shift.

This is without the attempted phase shift:

y = 3*sin(x*(2*pi/4))+2;
x = [0:0.1:100];

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Answer 1

Wayne King 2013-11-16

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/106420-problems-to-compute-a-phase-shift-using-sinusoidal-functions#answer_115439

在 MATLAB Online 中打开

   x = 0:0.1:10;
   y1 = 3*sin(4*x); % phase of zero
   y2 = 3*sin(4*(x-pi/4)); % phase shift of \pi radians
   plot(x,y1); 
   hold on
   plot(x,y2,'r')