Index exceeds matrix dimensions using pca in matlab 2013a

Question

Datti Nagadhara Harini 2014-5-29

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/131630-index-exceeds-matrix-dimensions-using-pca-in-matlab-2013a

回答： Geoff Hayes 2014-7-16

here is the sample code:

temp_files = dir([temp_dir '\*.jpg']); im_waves = zeros(size(temp_files,1),2551);

        for j1 = 1:size(temp_files,1)
            filename = fullfile(temp_dir,temp_files(j1).name);
            temp_im = imresize(double(imread(filename)),[50 50]);
%             temp_im = imresize((imread(filename)),[50 50]);
            [im_waves(j1,:),~] =  feature_extraction_phase2(temp_im);
        end
        mean_waves = mean(im_waves);
        centered_waves = im_waves - repmat(mean_waves,[size(temp_files,1) 1]);
        [evectors,~, evalues] = princomp(centered_waves);
        num_eigenfaces = 50;
        evectors = evectors(:, 1:num_eigenfaces); // |the error is index exceeds matrix dimensions|
        reduced_output_waves = evectors' * centered_waves';
        reduced_input_waves = evectors' * (waves_ip - mean_waves)';
        temp_score = arrayfun(@(n) 1 / (1 + norm(reduced_output_waves(:,n) - reduced_input_waves)), 1:size(temp_files,1));
       score = [score,temp_score];