TukeyBiweight.weights()
statsmodels.robust.norms.TukeyBiweight.weights
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TukeyBiweight.weights(z)
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Tukey’s biweight weighting function for the IRLS algorithm
The psi function scaled by z
Parameters: z : array-like
1d array
Returns: weights : array
psi(z) = (1 - (z/c)**2)**2 for |z| <= R
psi(z) = 0 for |z| > R
© 2009–2012 Statsmodels Developers
© 2006–2008 Scipy Developers
© 2006 Jonathan E. Taylor
Licensed under the 3-clause BSD License.
http://www.statsmodels.org/stable/generated/statsmodels.robust.norms.TukeyBiweight.weights.html