Hampel.weights(z)
[source]
Hampel weighting function for the IRLS algorithm
The psi function scaled by z
Parameters: | z (array-like) – 1d array |
---|---|
Returns: |
weights – weights(z) = 1 for |z| <= a weights(z) = a/|z| for a < |z| <= b weights(z) = a*(c - |z|)/(|z|*(c-b)) for b < |z| <= c weights(z) = 0 for |z| > c |
Return type: | array |
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© 2006 Jonathan E. Taylor
Licensed under the 3-clause BSD License.
http://www.statsmodels.org/stable/generated/statsmodels.robust.norms.Hampel.weights.html