statsmodels.robust.norms.AndrewWave.weights¶
-
AndrewWave.
weights
(z)[source]¶ Andrew’s wave weighting function for the IRLS algorithm
The psi function scaled by z
- Parameters
- zarray_like
1d array
- Returns
- weights
ndarray
weights(z) = sin(z/a)/(z/a) for |z| <= a*pi
weights(z) = 0 for |z| > a*pi
- weights