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how to use PCA coefficients (princomp)

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A 2012년 12월 10일
I have matrix of 10000 rows and 500 columns where rows are observations and columns for features. The data is for three different classes (appx 3300 samples of each class). Now I want to apply princomp for PCA to reduce dimension of data. The coefficients matrix results in 500X500 and score is same matrix dimension as original (10000X500).
Kindly help me how can I modify my original data (10000X500) using coefficients and score matrices ? what is the procedure?
Thanks and in advance!

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