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pca [2016/03/10 10:00]
melancon
pca [2016/03/10 10:02] (current)
melancon [General case]
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   * Observe that the preceding computations may be extended to the case where elements $e_i$ are weighted, that is $\pi_i$ denotes the weight of element $e_i$ with $\sum_i \pi_i = 1$. The matrix $D$ can then be replaced by the adequate diagonal matrix whose entries record the elements'​ weights.   * Observe that the preceding computations may be extended to the case where elements $e_i$ are weighted, that is $\pi_i$ denotes the weight of element $e_i$ with $\sum_i \pi_i = 1$. The matrix $D$ can then be replaced by the adequate diagonal matrix whose entries record the elements'​ weights.
  
-$$ 
-\frac{\lambda_1}{\lambda_1 + \cdots + \lambda_p}, \frac{\lambda_1 + \lambda_2}{\lambda_1 + \cdots + \lambda_p}, \ldots 
-$$ 
/net/html/perso/melancon/Visual_Analytics_Course/data/pages/pca.txt · Last modified: 2016/03/10 10:02 by melancon