statsmodels.robust.scale.mad(a, c=0.67448975019608171, axis=0, center=<function median>)[source]

The Median Absolute Deviation along given axis of an array


a : array-like

Input array.

c : float, optional

The normalization constant. Defined as scipy.stats.norm.ppf(3/4.), which is approximately .6745.

axis : int, optional

The defaul is 0. Can also be None.

center : callable or float

If a callable is provided, such as the default np.median then it is expected to be called center(a). The axis argument will be applied via np.apply_over_axes. Otherwise, provide a float.


mad : float

mad = median(abs(a - center))/c