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statsmodels.robust.norms.RobustNorm.psi
statsmodels.robust.norms.RobustNorm.psi
¶
RobustNorm.
psi
(
z
)
[source]
¶
Derivative of rho. Sometimes referred to as the influence function.
Abstract method:
psi = rho’
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statsmodels.robust.norms.RobustNorm
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statsmodels.robust.norms.RobustNorm.psi