Description: LDA dimension reduction first and then the USPS handwritten sort, although the effect is not very good, but it can provide you an idea.
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File list (Check if you may need any files):
LDA降维后再排序\EuDist2.m
...............\LDA.m
...............\test_demo.m
...............\USPS.mat
LDA降维后再排序
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