slope_derivative_3d

slope_derivative_3d(X: ndarray) → ndarray

Numba slope derivative transformation for a 3d numpy array.

Finds the derivative of the series, padding the first and last values so that the length stays the same.

Parameters:

X3d numpy array

A 3d numpy array of values

Returns:

arr3d numpy array

The slope derivative of each series

Examples

>>> import numpy as np
>>> from aeon.utils.numba.general import slope_derivative_3d
>>> X = np.array([
...     [[1, 2, 2, 3, 3, 3, 4, 4, 4, 4], [5, 6, 6, 7, 7, 7, 8, 8, 8, 8]],
...     [[4, 4, 4, 4, 3, 3, 3, 2, 2, 1], [8, 8, 8, 8, 7, 7, 7, 6, 6, 5]],
... ])
>>> X_der = slope_derivative_3d(X)