Difference between revisions of "ApCoCoA1:Num.QR"
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Revision as of 12:09, 22 October 2007
Numerical.QR
QRdecomposition of a matrix
Syntax
$numerical.QR(A:Matrix):Matrix;
Description
This function returns a matrix, containing the IMPI. The matrix consists
of the upperright triangular matrix and the lower left triangular matrix,
describing the input matrix's QRdecomposition.
Example
Points:=Mat([[1,2,3],[2,3,4],[3,4,5]]); $numerical.QR(Points);  Mat([ [8425463406411593/2251799813685248, 7598355191047809/18014398509481984, 5698766393285857/9007199254740992], [1504547036859213/281474976710656, 737074506864293/1125899906842624, 7744099468837749/9007199254740992], [7823644591667907/1125899906842624, 5896596054914343/4503599627370496, 809/4611686018427387904] ]) 
See also
Numerical.EigenValuesAndVectors
Numerical.EigenValuesAndAllVectors