WrightTools.kit.diff¶
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WrightTools.kit.
diff
(xi, yi, order=1) → numpy.ndarray[source]¶ 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