bisquarePsi

<p>Pre-built <code>psi_func_rcpp</code> from <code>makeBisquarePsi</code> with
the conventional tuning constant <code>c = 4.685</code> (\(\approx 95\%\)
efficiency at the normal model). The bisquare redescends comparatively
fast; <code>lqqPsi</code> is the recommended redescender.</p>

Implements the Robust Scoring Equations estimator to fit linear
mixed effects models robustly.
Robustness is achieved by modification of the scoring equations
combined with the Design Adaptive Scale approach.

Manuel Koller

bisquarePsi: Default Tukey bisquare psi-function with `c = 4.685`.

Description

Arguments

See Also