I want a code for kernel PCA

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BANI tita 2013-2-14

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评论： Hariprasad Kannan 2018-3-7

hello, I am looking for a site where I can find a program reduction dimentionality kernel PCA think you

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Shashank Prasanna 2013-2-14

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MATLAB currently doesn't offer this as a part of the statistics toolbox. In the past I've used this and it worked really well for me:

http://homepage.tudelft.nl/19j49/Matlab_Toolbox_for_Dimensionality_Reduction.html

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BANI tita 2013-2-19

编辑：Walter Roberson 2013-2-19

在 MATLAB Online 中打开

hello,

here is the program I run but still it gives me same error

 %%%-----------------------------------
load baseAT.mat;
    X=PA;
    labels=lblsa;
  figure, scatter3(X(:,1), X(:,2), X(:,3), 5, labels); title('Original dataset'), drawnow
  no_dims = round(intrinsic_dim(X, 'EigValue'));
  disp(['MLE estimate of intrinsic dimensionality: ' num2str(no_dims)]);
  mappedX = compute_mapping(X, 'KernelPCA', no_dims, 7);  
  figure, scatter(mappedX(:,1), mappedX(:,2), 5, labels); title('Result of dimensionality reduction'), drawnow