wehub-resource-sync
22 lines
408 B
Matlab
Executable File
22 lines
408 B
Matlab
Executable File
function model = knPca(X, q, kn)
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% Kernel PCA
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% Input:
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% X: d x n data matrix
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% q: target dimension
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% kn: kernel function
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% Ouput:
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% model: trained model structure
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% Written by Mo Chen (sth4nth@gmail.com).
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if nargin < 3
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kn = @knGauss;
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end
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K = knCenter(kn,X);
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[V,L] = eig(K);
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[L,idx] = sort(diag(L),'descend');
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V = V(:,idx(1:q));
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L = L(1:q);
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model.kn = kn;
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model.V = V;
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model.L = L;
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model.X = X; |