logregBY: Bianco and Yohai estimator for logistic regression
Description
This function computes the M-estimator proposed by Bianco and Yohai for
logistic regression. By default, an intercept term is included and p
parameters are estimated. Modified by Yohai (2018) to take as initial estimator
a weighted ML estimator with weights derived from the MCD estimator.
For more details we refer to Croux, C., and Haesbroeck, G. (2002),
"Implementing the Bianco and Yohai estimator for Logistic Regression"