statsmodels.robust.norms.RamsayE¶
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class
statsmodels.robust.norms.
RamsayE
(a=0.3)[source]¶ Ramsay’s Ea for M estimation.
Parameters: a : float, optional
The tuning constant for Ramsay’s Ea function. The default value is 0.3.
See also
Methods
psi
(z)The psi function for Ramsay’s Ea estimator psi_deriv
(z)The derivative of Ramsay’s Ea psi function. rho
(z)The robust criterion function for Ramsay’s Ea. weights
(z)Ramsay’s Ea weighting function for the IRLS algorithm