DGEQPFRun Method

public void Run(
	int M,
	int N,
	ref double[] A,
	int offset_a,
	int LDA,
	ref int[] JPVT,
	int offset_jpvt,
	ref double[] TAU,
	int offset_tau,
	ref double[] WORK,
	int offset_work,
	ref int INFO
)

Public Sub Run ( 
	M As Integer,
	N 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 WORK As Double(),
	offset_work As Integer,
	ByRef INFO 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

A  Double

(input/output) DOUBLE PRECISION array, dimension (LDA,N) On entry, the M-by-N matrix A. On exit, the upper triangle of the array contains the min(M,N)-by-N upper triangular matrix R; the elements below the diagonal, together with the array TAU, represent the orthogonal matrix Q as a product of min(m,n) elementary reflectors.

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

 

WORK  Double

(workspace) DOUBLE PRECISION array, dimension (3*N)

offset_work  Int32

 

INFO  Int32

(output) INTEGER = 0: successful exit .LT. 0: if INFO = -i, the i-th argument had an illegal value

Reference