How to find Peaks and Troughs in a series of data

Hey guys, I have to prepare a code to find the peaks and Troughs of a series of data. The data, itself, has small noise which results in local maximums in trough areas......and vice versa.....What I have to do in the first step is to develop 2 vectors in which Peaks and Troughs are put respectively. meanwhile, I have to eliminate these noise. I would appreciate if any guy help me in this respect. Thanks in advance, Sincerely,

Answer 1

[Image Analyst]

If you have the Image Processing Toolbox, use imregionmin() and imregionalmax(). If you have the Signal Processing Toolbox, use findpeaks().

[Borhan]

Thank you for your answer, but I have to write a code for this and I have no idea about it. Thanks again

[Image Analyst]

Did you look at the examples in the help for those functions and start out by trying them? Is your signal 1D or 2D?