Detect valleys of a signal

1. What does Find_peaks return?
2. How does Scipy signal Find_peaks work?

What does Find_peaks return?

pks = findpeaks( data ) returns a vector with the local maxima (peaks) of the input signal vector, data . A local peak is a data sample that is either larger than its two neighboring samples or is equal to Inf . The peaks are output in order of occurrence.

How does Scipy signal Find_peaks work?

Find peaks inside a signal based on peak properties. This function takes a 1-D array and finds all local maxima by simple comparison of neighboring values. Optionally, a subset of these peaks can be selected by specifying conditions for a peak's properties.