first_order_differences_2d

first_order_differences_2d(X: ndarray) → ndarray

Numba first order differences function for a 2d numpy array.

Parameters:

X2d numpy array

A 2d numpy array of values

Returns:

arr2d numpy array of shape (X.shape[0], X.shape[1] - 1)

The first order differences for axis 1 of the input array

Examples

>>> import numpy as np
>>> from aeon.utils.numba.general import first_order_differences_2d
>>> X = np.array([[1, 2, 2, 3, 3, 3, 4, 4, 4, 4], [5, 6, 6, 7, 7, 7, 8, 8, 8, 8]])
>>> diff = first_order_differences_2d(X)