#StackBounty: #dimensionality-reduction #discriminant-analysis Calculation of Covariance for both LDA lecturer notes is different

Bounty: 50

I am reading both LDA lecturer notes and follow the example, both having different covariance calculation.

In LDA lecturer note 1 slide 19,

Did not multiple by number of samples when calculating Covaraince matrix S1, S2.

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In LDA lecture note 2‘ slide 20

She calculate covariance using by multiple the number of samples.

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