a b/combinedDeepLearningActiveContour/minFunc/logistic/LogisticHv.m 

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function [Hv] = LogisticHv(v,w,X,y)





  
  

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% v(feature,1) - vector that we will multiply Hessian by





  
  

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% w(feature,1)





  
  

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% X(instance,feature)





  
  

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% y(instance,1)





  
  

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sig = 1./(1+exp(-y.*(X*w)));





  
  

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Hv = X.'*(sig.*(1-sig).*(X*v));