Cut a signal in Time domain

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Hamza Hamza 2022-6-15

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https://ww2.mathworks.cn/matlabcentral/answers/1740585-cut-a-signal-in-time-domain

评论： Mathieu NOE 2022-6-17

Hey ,

for a project i have to generate a sinusoidal signal(force signal) and a second signal with a step function(speed signal) , then try to get the amplitude of the force signal and the phase difference to the speed signal. In which i have to cut the force signal in time domain in the same time of the step of the speed signal , and then show the amplitude and phase at that point using FFT. any Ideas ?

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Hamza Hamza 2022-6-16

here is the signal , a normal cosin function which i need just to take the second half of it for example (starting from 1 sec) . I will be very glad for your help.

Mathieu NOE 2022-6-17

在 MATLAB Online 中打开

see example below

clc
clearvars
t = (0:0.01:2);
y = cos(2*pi*5*t);
% select second hal of signal , t>= 1 
ind = (t>=1) ; % logical array
t2 = t(ind);
y2 = y(ind);
plot(t,y,t2,y2,'r')