WrightTools.kit.diff

WrightTools.kit.diff(xi, yi, order=1) → ndarray

Take the numerical derivative of a 1D array.

Output is mapped onto the original coordinates using linear interpolation. Expects monotonic xi values.

Parameters:

• xi (1D array-like) – Coordinates.

• yi (1D array-like) – Values.

• order (positive integer (optional)) – Order of differentiation.

Returns:

Numerical derivative. Has the same shape as the input arrays.

Return type:

1D numpy array