Get peak point [up and bottom] from accelerometer data using python -

i newbie in signal processing, in here, want ask how peak point accelerometer data. visualization of data one: enter image description here

if have data set of coordinates or data points above visualization, simple using built-in min , max functions:

if data simple array of numbers, e.g. arr = [12, 33, -17, ...]:

peak = max(arr) trough = min(arr)  print peak, trough

will print 33, -17

if list of coordinates, e.g. coords = [(0, 12), (1, 33), (2, -17), ...]:

peak = max(coords, key=lambda x: x[1]) trough = min(coords, key=lambda x: x[1])  print peak, trough

will print (1, 33), (2, -17)

these functions take key argument function apply elements of list compare them. in example, extract 2nd element of tuple.

Script