Input: The sample number, mean, eigenvectors, eigenvalues of old data, , , , , the sample number and mean of | added samples , , , the sample number and mean of deleted samples , , . | Output: The sample number, mean, eigenvectors, eigenvalues of remained data, , , , . | (1) Update the sample number and mean, , . | (2) Compute the extra sample, , , . | (3) Equivalent added data matrix, . | (4) Equivalent deleted data matrix, . | (5) Compute , via EVD-Dualdating with , and added data , deleted data . |
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