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<p>and is closely related to <a href="page.php?w=factor_analysis">factor analysis</a>. Factor analysis typically incorporates more domain-specific assumptions about the underlying structure and solves eigenvectors of a slightly different matrix. PCA is also related to <a href="page.php?w=Canonical_correlation">canonical correlation analysis (CCA)</a>. CCA defines coordinate systems that optimally describe the <a href="page.php?w=cross-covariance">cross-covariance</a> between two datasets while PCA defines a new <a href="page.php?w=orthogonal_coordinate_system">orthogonal coordinate system</a></p><p>
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