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  QR(A)
Returns the QR factorization or QR decomposition of matrix A.

This routine uses the TNT library.

The first element returned is the orthogonal matrix (usually denoted as Q). The second element returned is the upper triangular matrix (R).


Examples  


References
http://mathworld.wolfram.com/QRDecomposition.html
http://en.wikipedia.org/wiki/QR_decomposition

Related Functions
Eigenvalues, SVD, Cholesky





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