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Line 10: The hat matrix is [[idempotent]], that is, <math>\mathbf {HH=H}</math>. Some other useful properties of the hat matrix are summarized in <ref>P. Gans, ''Data Fitting in the Chemical Sciences,'', Wiley, 1992.</ref> == See also == [[Studentized residuals]] == References == <references />

Projection matrix: Difference between revisions