www.pudn.com > starter.zip > LogisticHv.m, change:2011-01-04,size:216b


function [Hv] = LogisticHv(v,w,X,y) 
% v(feature,1) - vector that we will multiply Hessian by 
% w(feature,1) 
% X(instance,feature) 
% y(instance,1) 
 
sig = 1./(1+exp(-y.*(X*w))); 
Hv = X.'*(sig.*(1-sig).*(X*v));