np_diff

dtaianomaly.utils.np_diff(x)[source]

Numba implementation for np.diff(x).

Computes the difference of each pair of consecutive values, i.e., the element at position \(i\) in the output is computed as element \(i\) in x subtracted from element \(i+1\) in x. Consequently, the output will have one element less than the given array.

Parameters:

xnp.array of shape (N,): The array on which the difference should be computed.

Returns:

np.array of shape (N-1,): Identical as np.diff(x)

Examples

>>> import numpy as np
>>> from dtaianomaly.utils import np_diff
>>> np_diff(np.array([0, 3, 4, 2, 6, 1]))
array([ 3,  1, -2,  4, -5])