huber_weight.m

基于M估计的迭代最小二乘算法

function [weight] = Huber_weight(z)
%Huber_weight   caculate weight value based on Huber's t function where t=2
%   [weight] = Huber_weight(z), where z is a scaled residual, produce Huber
%   weight.
t=2;
if(z>=-t&&z<=t)
    weight=1;
else 
    weight=t/abs(z);
end