Question: QUESTION 15 N data points x; i = 1,...,N are each described by a feature vectors f;(x;).j= 1,..., d. The sum of squares of all

QUESTION 15 N data points x; i = 1,...,N are each

QUESTION 15 N data points x; i = 1,...,N are each described by a feature vectors f;(x;).j= 1,..., d. The sum of squares of all components of all points is Nd S= f?(x). i =lj=1 Let F be a matrix such that each of its columns is the feature vector of a data point. O A S=trace(FFT) B.S=trace(FTF) O C. None of the above

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