Random time series warping

random_timeseries.py

from random import randrange as rr

# Use with: http://mlpy.sourceforge.net/docs/3.5/dtw.html#id3

def random_timesequence(start, end, steps=3):
    seq = []
    for n in range(start, end):
        # Randomize the number of sub-steps,
        # but maintain the bounds and monotonicity
        # (e.g. 0, 0, 1, 1, 1, 2, 3, 3, 3)
        for i in range(rr(0, steps)):
            seq.append(n)
    return seq