ManagedLapack.LQOrthogonalMultiply Method

public override void LQOrthogonalMultiply(
	MatrixOperationSide side,
	TransposeOperation trans,
	int m,
	int n,
	int k,
	Span<double> a,
	int lda,
	ReadOnlySpan<double> tau,
	Span<double> c,
	int ldc,
	out int info
)

Public Overrides Sub LQOrthogonalMultiply ( 
	side As MatrixOperationSide,
	trans As TransposeOperation,
	m As Integer,
	n As Integer,
	k As Integer,
	a As Span(Of Double),
	lda As Integer,
	tau As ReadOnlySpan(Of Double),
	c As Span(Of Double),
	ldc As Integer,
	<OutAttribute> ByRef info As Integer
)

public:
virtual void LQOrthogonalMultiply(
	MatrixOperationSide side, 
	TransposeOperation trans, 
	int m, 
	int n, 
	int k, 
	Span<double> a, 
	int lda, 
	ReadOnlySpan<double> tau, 
	Span<double> c, 
	int ldc, 
	[OutAttribute] int% info
) override

abstract LQOrthogonalMultiply : 
        side : MatrixOperationSide * 
        trans : TransposeOperation * 
        m : int * 
        n : int * 
        k : int * 
        a : Span<float> * 
        lda : int * 
        tau : ReadOnlySpan<float> * 
        c : Span<float> * 
        ldc : int * 
        info : int byref -> unit 
override LQOrthogonalMultiply : 
        side : MatrixOperationSide * 
        trans : TransposeOperation * 
        m : int * 
        n : int * 
        k : int * 
        a : Span<float> * 
        lda : int * 
        tau : ReadOnlySpan<float> * 
        c : Span<float> * 
        ldc : int * 
        info : int byref -> unit 

Parameters

side  MatrixOperationSide

SIDE is CHARACTER*1 = 'L': apply Q or Q**T from the Left; = 'R': apply Q or Q**T from the Right.

trans  TransposeOperation

TRANS is CHARACTER*1 = 'N': No transpose, apply Q; = 'T': Transpose, apply Q**T.

m  Int32

M is INTEGER The number of rows of the matrix C. M >= 0.

n  Int32

N is INTEGER The number of columns of the matrix C. N >= 0.

k  Int32

K is INTEGER The number of elementary reflectors whose product defines the matrix Q. If SIDE = 'L', M >= K >= 0; if SIDE = 'R', N >= K >= 0.

a  Span<Double>

A is DOUBLE PRECISION array, dimension (LDA,M) if SIDE = 'L', (LDA,N) if SIDE = 'R' The i-th row must contain the vector which defines the elementary reflector H(i), for i = 1,2,...,k, as returned by DGELQF in the first k rows of its array argument A.

lda  Int32

LDA is INTEGER The leading dimension of the array A. LDA >= max(1,K).

tau  ReadOnlySpan<Double>

TAU is DOUBLE PRECISION array, dimension (K) TAU(i) must contain the scalar factor of the elementary reflector H(i), as returned by DGELQF.

c  Span<Double>

C is DOUBLE PRECISION array, dimension (LDC,N) On entry, the M-by-N matrix C. On exit, C is overwritten by Q*C or Q**T*C or C*Q**T or C*Q.

ldc  Int32

LDC is INTEGER The leading dimension of the array C. LDC >= max(1,M).

info  Int32

INFO is INTEGER = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value

. . H(2) H(1) as returned by DGELQF. Q is of order M if SIDE = 'L' and of order N if SIDE = 'R'.

Authors: Univ. of Tennessee, Univ. of California Berkeley, Univ. of Colorado Denver, NAG Ltd.

Date: November 2015

Reference