slope_derivative_2d

slope_derivative_2d(X: ndarray) → ndarray

Numba slope derivative transformation for a 2d numpy array.

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

Parameters:

X2d numpy array

A 2d numpy array of values

Returns:

arr2d numpy array

The slope derivative of each series

Examples

>>> import numpy as np
>>> from aeon.utils.numba.general import slope_derivative_2d
>>> X = np.array([[1, 2, 2, 3, 3, 3, 4, 4, 4, 4], [5, 6, 6, 7, 7, 7, 8, 8, 8, 8]])
>>> X_der = slope_derivative_2d(X)