ILMathqr Method (InArrayfcomplex)

ILNumerics Ultimate VS Documentation

ILNumerics - Technical Application Development

QR decomposition - raw output as returned from LAPACK.

[ILNumerics Computing Engine]

Namespace: ILNumerics
Assembly: ILNumerics.Computing (in ILNumerics.Computing.dll) Version: 5.5.0.0 (5.5.7503.3146)

Syntax

Copy

public static RetArray<fcomplex> qr(
	InArray<fcomplex> A
)

Public Shared Function qr ( 
	A As InArray(Of fcomplex)
) As RetArray(Of fcomplex)

Dim A As InArray(Of fcomplex)
Dim returnValue As RetArray(Of fcomplex)

returnValue = ILMath.qr(A)

Parameters

A: Type: ILNumericsInArrayfcomplex
Input matrix.

Return Value

Type: RetArrayfcomplex
Orthonormal / unitary matrix Q and upper triangular matrix R packed into a single matrix. This is the output of the lapack function ?geqrf.

Remarks

Input matrix A is not altered.

The matrix returned is the direct output of the lapack function [d,s,c,z]geqrf, respectively. It contains the decomposition factors Q and R, but they are combined into a single matrix. Overloads exist which return Q and R individually: qr(InArrayfcomplex, OutArrayfcomplex, Boolean).

[ILNumerics Computing Engine]

Reference

ILMath Class

qr Overload

ILNumerics Namespace

ILMathAddLanguageSpecificTextSet("LSTCDA541F8_0?cpp=::|nu=.");qr Method (InArrayAddLanguageSpecificTextSet("LSTCDA541F8_1?cs=&lt;|vb=(Of |cpp=&lt;|fs=&lt;'|nu=(");fcomplexAddLanguageSpecificTextSet("LSTCDA541F8_2?cs=&gt;|vb=)|cpp=&gt;|fs=&gt;|nu=)");)

Parameters

Return Value

Reference

ILMathqr Method (InArrayfcomplex)