SPIDER The Spider Objects

PARZEN object


   A=PARZEN(H) returns a parzen object initialized with hyperparameters H. 
  
   Kernel density estimation.
  
   Model
    child=kernel('Gaussian') -- the kernel to use
  
   Methods:
    train, test 
  
   Sample demo code:
   -----------------
  d=data(randn(30,1));
  dtst=data([-5:0.1:5]');
  figure(1);clf;
  for j=1:9
   subplot(3,3,j);
   plot(d.X,d.X*0,'x'); 
   a=parzen; a.kerparam=1/(2^(j-2)); 
   [r a]=train(a,d); r=test(a,dtst);
   hold on ; [u ind]=sort(dtst.X); 
   plot(dtst.X(ind,:),r.X(ind,:),'-');
   title(['\sigma=1/2^{-' num2str(j) '}'])
  end

Reference : chapter 4 (Richard O. Duda and Peter E. Hart) Parzen Windows
Author : Richard O. Duda , Peter E. Hart
Link : http://www.amazon.com/exec/obidos/tg/detail/-/0471056693/002-6279399-2828812?v=glance