Robust Regression Functions
Predict y from X and b
Median Absolute Deviation (MAD)
Median
Tukey's Bisquare Psi Function
Huber Psi Function
Robust Fitting of Linear Models using Bisquare Psi Function
Robust Fitting of Linear Models using Huber Psi Function
Linear regression functions using Huber and bisquare psi functions. Optimal weights are calculated using IRLS algorithm.