dorgl2.f(3) LAPACK dorgl2.f(3)
subroutine dorgl2 (M, N, K, A, LDA, TAU, WORK, INFO)
subroutine dorgl2 (integerM, integerN, integerK, double precision, dimension( lda, * )A,
integerLDA, double precision, dimension( * )TAU, double precision, dimension( * )WORK,
DORGL2 generates an m by n real matrix Q with orthonormal rows,
which is defined as the first m rows of a product of k elementary
reflectors of order n
Q = H(k) . . . H(2) H(1)
as returned by DGELQF.
M is INTEGER
The number of rows of the matrix Q. M >= 0.
N is INTEGER
The number of columns of the matrix Q. N >= M.
K is INTEGER
The number of elementary reflectors whose product defines the
matrix Q. M >= K >= 0.
A is DOUBLE PRECISION array, dimension (LDA,N)
On entry, 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.
On exit, the m-by-n matrix Q.
LDA is INTEGER
The first dimension of the array A. LDA >= max(1,M).
TAU is DOUBLE PRECISION array, dimension (K)
TAU(i) must contain the scalar factor of the elementary
reflector H(i), as returned by DGELQF.
WORK is DOUBLE PRECISION array, dimension (M)
INFO is INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument has an illegal value
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
Definition at line 114 of file dorgl2.f.
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Version 3.4.2 Tue Sep 25 2012 dorgl2.f(3)