Main
Home
Quick tour
Handbook
Docs
Mailing Lists
Demonstration
Download
Sourceforge project
FAQ
Links


Toolboxes
Char
Control
Crypto
Deprecated
Engine
Finance
FunFun
General
Graphics 3D
Graphics
Image
Integration
InputOutput
JMathLib
LinearAlgebra
Matrix
Miscellaneous
Net
Polynomial
Set
Signal
SpecFun
SpecialMatrix
Statistics
String
System
Time
Trigonometric
UserInterface
...


Contact
Developers

JMathLib
A Java Clone of Octave, SciLab, Freemat and Matlab.

[Index] [Documentation] [Demonstration] [Download]

qr

Type: External

Group: matrix

Syntax

QR(matrix)

Description

Calculates the QR decomposition of matrix.

Notes

For an m-by-n matrix A with m >= n, the QR decomposition is an m-by-n orthogonal matrix Q and an n-by-n upper triangular matrix R so that A = Q*R. The QR decompostion always exists, even if the matrix does not have full rank, so the constructor will never fail. The primary use of the QR decomposition is in the least squares solution of nonsquare systems of simultaneous linear equations. This will fail if isFullRank() returns false.

See Also

chol, lu

Last modified
sourceforge