centos man page for dorg2r

dorg2r.f(3)							      LAPACK							       dorg2r.f(3)

NAME
       dorg2r.f -

SYNOPSIS
   Functions/Subroutines
       subroutine dorg2r (M, N, K, A, LDA, TAU, WORK, INFO)
	   DORG2R generates all or part of the orthogonal matrix Q from a QR factorization determined by sgeqrf (unblocked algorithm).

Function/Subroutine Documentation
   subroutine dorg2r (integerM, integerN, integerK, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )TAU,
       double precision, dimension( * )WORK, integerINFO)
       DORG2R generates all or part of the orthogonal matrix Q from a QR factorization determined by sgeqrf (unblocked algorithm).

       Purpose:

	    DORG2R generates an m by n real matrix Q with orthonormal columns,
	    which is defined as the first n columns of a product of k elementary
	    reflectors of order m

		  Q  =	H(1) H(2) . . . H(k)

	    as returned by DGEQRF.

       Parameters:
	   M

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

	   N

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

	   K

		     K is INTEGER
		     The number of elementary reflectors whose product defines the
		     matrix Q. N >= K >= 0.

	   A

		     A is DOUBLE PRECISION array, dimension (LDA,N)
		     On entry, the i-th column must contain the vector which
		     defines the elementary reflector H(i), for i = 1,2,...,k, as
		     returned by DGEQRF in the first k columns of its array
		     argument A.
		     On exit, the m-by-n matrix Q.

	   LDA

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

	   TAU

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

	   WORK

		     WORK is DOUBLE PRECISION array, dimension (N)

	   INFO

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

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Definition at line 115 of file dorg2r.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2							  Tue Sep 25 2012						       dorg2r.f(3)