The Width of Gaussian Kernel
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I have a MATLAB code for a gaussian kernel (Radial Basis Function):
dist = EuDist2(X{it},C{it},0);
sigma = mean(min(dist,[],2).^0.5)*2;
feaVec = exp(-dist/(2*sigma*sigma));
X and C are a known matrices;
What is the name of method used for the calculation of Sigma that way? is it a standard technique ?
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