EigenFaces. (squared) Variance. A measure of how "spread out" a sequence of numbers are. Covariance matrix. A measure of correlation between data elements. Example: Data set of size n Each data element has 3 fields: Height Weight Birth date. Covariance. [Collect data from class].
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A vector (the eigenvector)
A scalar λ(the eigenvalue)
(the zero vector isn't an eigenvector)
To convert back to "world units":
9.08 187.4 -551.7 -114.4 -328.8 29.2 -371.9 -108.0
1277.0 150.9 -133.6 249.3 338.9 13.14 16.8 3.35