Tukey’s biweight function for M-estimation.
Parameters: | c : float, optional
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Notes
Tukey’s biweight is sometime’s called bisquare.
Methods
psi(z) | The psi function for Tukey’s biweight estimator |
psi_deriv(z) | The derivative of Tukey’s biweight psi function |
rho(z) | The robust criterion function for Tukey’s biweight estimator |
weights(z) | Tukey’s biweight weighting function for the IRLS algorithm |
Methods
psi(z) | The psi function for Tukey’s biweight estimator |
psi_deriv(z) | The derivative of Tukey’s biweight psi function |
rho(z) | The robust criterion function for Tukey’s biweight estimator |
weights(z) | Tukey’s biweight weighting function for the IRLS algorithm |