How to find the peaks without using findpeaks function?

I dont have signal processing toolbox.

I have attached the file.

[Rik]

Have a read here and here. It will greatly improve your chances of getting an answer.

What defines a peak? Once you define that in mathematical terms, the rest is just implementation and optimization.

Also, should the result be the exact same as the Matlab function? You might have to be careful not to infringe any copyright if you want to attempt something like that. You can have a look at how GNU Octave has implemented this function, but there you need to be careful about the licencing as well.

Answer 1

[Guillaume]

There are several alternatives to the Signal Processing Toolbox findpeaks on the file exchange.

This one and this one are the first two I found. I'm sure you can use your favorite search engine to find more.