Crossing point detection

[cristi-neagu]

Hello,

This is to suggest a new functionality added to numpy arrays. Mainly, rising and falling edge detection. I assume many people use numpy array for signal storage (i certainly am). In many instances an edge detection algorithm would be very useful.

This could be emulated on how oscilloscope triggers work, with a signal level being defined and a crossing direction. The return to this function would be similar to the return of the numpy.where() function.

Workarounds for the lack of this functionality are complicated and convoluted, and most of them fail when the trigger value is present in the array.

Thank you.

[WarrenWeckesser]

@cristi-neagu, this issue has been untouched for a few years--sorry no one responded for so long!

This functionality sounds useful, but it is out of scope for NumPy.