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5.3 ORTHOGONAL TRANSFORMATIONS AND …
The Matrix of an Orthogonal projection The transpose allows us to write a formula for the matrix of an orthogonal projection. Con-sider first the orthogonal projection projL~x = (v~1 ¢~x)v~1 onto a line L in Rn, where v~1 is a unit vector in L. If we view the vector v~1 as an n £ 1 matrix and the scalar v~1 ¢~x as a 1 £ 1, we can write ...
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