DLAQP2Run Method

public void Run(
	int M,
	int N,
	int OFFSET,
	ref double[] A,
	int offset_a,
	int LDA,
	ref int[] JPVT,
	int offset_jpvt,
	ref double[] TAU,
	int offset_tau,
	ref double[] VN1,
	int offset_vn1,
	ref double[] VN2,
	int offset_vn2,
	ref double[] WORK,
	int offset_work
)

Public Sub Run ( 
	M As Integer,
	N As Integer,
	OFFSET As Integer,
	ByRef A As Double(),
	offset_a As Integer,
	LDA As Integer,
	ByRef JPVT As Integer(),
	offset_jpvt As Integer,
	ByRef TAU As Double(),
	offset_tau As Integer,
	ByRef VN1 As Double(),
	offset_vn1 As Integer,
	ByRef VN2 As Double(),
	offset_vn2 As Integer,
	ByRef WORK As Double(),
	offset_work As Integer
)

Parameters

M  Int32

(input) INTEGER The number of rows of the matrix A. M .GE. 0.

N  Int32

(input) INTEGER The number of columns of the matrix A. N .GE. 0.

OFFSET  Int32

(input) INTEGER The number of rows of the matrix A that must be pivoted but no factorized. OFFSET .GE. 0.

A  Double

(input/output) DOUBLE PRECISION array, dimension (LDA,N) On entry, the M-by-N matrix A. On exit, the upper triangle of block A(OFFSET+1:M,1:N) is the triangular factor obtained; the elements in block A(OFFSET+1:M,1:N) below the diagonal, together with the array TAU, represent the orthogonal matrix Q as a product of elementary reflectors. Block A(1:OFFSET,1:N) has been accordingly pivoted, but no factorized.

offset_a  Int32

 

LDA  Int32

(input) INTEGER The leading dimension of the array A. LDA .GE. max(1,M).

JPVT  Int32

(input/output) INTEGER array, dimension (N) On entry, if JPVT(i) .ne. 0, the i-th column of A is permuted to the front of A*P (a leading column); if JPVT(i) = 0, the i-th column of A is a free column. On exit, if JPVT(i) = k, then the i-th column of A*P was the k-th column of A.

offset_jpvt  Int32

 

TAU  Double

(output) DOUBLE PRECISION array, dimension (min(M,N)) The scalar factors of the elementary reflectors.

offset_tau  Int32

 

VN1  Double

(input/output) DOUBLE PRECISION array, dimension (N) The vector with the partial column norms.

offset_vn1  Int32

 

VN2  Double

(input/output) DOUBLE PRECISION array, dimension (N) The vector with the exact column norms.

offset_vn2  Int32

 

WORK  Double

(workspace) DOUBLE PRECISION array, dimension (N)

offset_work  Int32

 

Reference