I would like to count the number of peaks of a signal.

Hello everone,

]I am working with a signal produced from my simulink model and I am doing some analysis on the signal but I dont know how to calculate the number of cycles?

Best regards

Answer 1

[Star Strider]

Use the signal Processing Toolbox findpeaks function to count the peaks. The plotted signal does not appear to be noisy, so it will likely not be necessary to use other name-value pair arguments (such as 'MinPeakProminence') to define the peaks). (I have no idea if this works with Simulink, since I very rarely use Simulink.)

Just use:

t = ...; % Time Vector

s = ...; % Signal Vector

[pks,locs] = findpeaks(s);

NrPks = numel(pks)

.

[mohamed ali]

thank you so much, your answer really helped!

[Star Strider]

As always, my pleasure!

Answer 2

[Askic V]

t = 0:0.01:2;
y = sin(20*t);
[z, ind] = findpeaks(y);
plot(t,y)
hold on
plot(t(ind), z, 'o')

number_cylces = numel(diff(z))

number_peaks = 6

If you need to find number of cycles, you need to fnd the number of peaks first. Matlab has a built in function called findpeaks :)

Answer 3

[Image Analyst]

In addition to findpeaks, if you don't have the Signal Processing Toolbox, you can use islocalmax in base MATLAB.