Finds the best path (an array of x- and y-coordinates) to align x to
y, given the cost matrix cost_mat = dtw_mat(x, y).
- Parameters:
- cost_mat(N, M) np.ndarray
The output of the dtw_mat() function.
- Returns:
- path(L, 2) np.ndarray
The path that aligns x to y in time.