# ITE / code / shared / embedded / ITL / centcorrenexp.m

 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32``` ```% The following function computes the parametric centered correntropy % between two vectors X and Y using double exponential kernel % % Input: X and Y are real valued COLUMN vectors of SAME length % kSize is a scalar for the kernel size, i.e. K(x,y) = exp(-|x-y|/kSize), % param is a [2x1] vector containing the coefficients a and b in ORDER. % % Output: corren contains the parametric centered correntropy % % Default: param = [a,b] = [1,0] and kSize = 1. % % Comments: The code uses cipexp % % Author: Sohan Seth (sohan@cnel.ufl.edu) Date: 15.07.2009 function corren = centcorrenexp(X,Y,kSize,param) if nargin == 2 kSize = 1; param = [1,0]; end if nargin == 3 param = [1,0]; end n = size(X,1); a = param(1); b = param(2); X = a*X+b; corren = (1/n)*sum(exp(-abs(X - Y)/kSize)) - cipexp(X,Y,kSize); ```
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