06-05-2010
If you talking about matrix, Didn't get your method how you are specifying the element?
which one replaced to which?
If you are talking in terms of rows and column, then also there is a confusion.
Can you please explain more clearly?
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LEARN ABOUT REDHAT
sgeqpf
SGEQPF(l) ) SGEQPF(l)
NAME
SGEQPF - routine is deprecated and has been replaced by routine SGEQP3
SYNOPSIS
SUBROUTINE SGEQPF( M, N, A, LDA, JPVT, TAU, WORK, INFO )
INTEGER INFO, LDA, M, N
INTEGER JPVT( * )
REAL A( LDA, * ), TAU( * ), WORK( * )
PURPOSE
This routine is deprecated and has been replaced by routine SGEQP3. SGEQPF computes a QR factorization with column pivoting of a real M-
by-N matrix A: A*P = Q*R.
ARGUMENTS
M (input) INTEGER
The number of rows of the matrix A. M >= 0.
N (input) INTEGER
The number of columns of the matrix A. N >= 0
A (input/output) REAL 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.
LDA (input) INTEGER
The leading dimension of the array A. LDA >= max(1,M).
JPVT (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 col-
umn 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.
TAU (output) REAL array, dimension (min(M,N))
The scalar factors of the elementary reflectors.
WORK (workspace) REAL array, dimension (3*N)
INFO (output) INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
FURTHER DETAILS
The matrix Q is represented as a product of elementary reflectors
Q = H(1) H(2) . . . H(n)
Each H(i) has the form
H = I - tau * v * v'
where tau is a real scalar, and v is a real vector with
v(1:i-1) = 0 and v(i) = 1; v(i+1:m) is stored on exit in A(i+1:m,i).
The matrix P is represented in jpvt as follows: If
jpvt(j) = i
then the jth column of P is the ith canonical unit vector.
LAPACK test version 3.0 15 June 2000 SGEQPF(l)