.TH "SRC/dorgr2.f" 3 "Version 3.12.0" "LAPACK" \" -*- nroff -*-
.ad l
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.SH NAME
SRC/dorgr2.f
.SH SYNOPSIS
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.PP
.SS "Functions/Subroutines"

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.ti -1c
.RI "subroutine \fBdorgr2\fP (m, n, k, a, lda, tau, work, info)"
.br
.RI "\fBDORGR2\fP generates all or part of the orthogonal matrix Q from an RQ factorization determined by sgerqf (unblocked algorithm)\&. "
.in -1c
.SH "Function/Subroutine Documentation"
.PP 
.SS "subroutine dorgr2 (integer m, integer n, integer k, double precision, dimension( lda, * ) a, integer lda, double precision, dimension( * ) tau, double precision, dimension( * ) work, integer info)"

.PP
\fBDORGR2\fP generates all or part of the orthogonal matrix Q from an RQ factorization determined by sgerqf (unblocked algorithm)\&.  
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\fBPurpose:\fP
.RS 4

.PP
.nf
 DORGR2 generates an m by n real matrix Q with orthonormal rows,
 which is defined as the last m rows of a product of k elementary
 reflectors of order n

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

 as returned by DGERQF\&.
.fi
.PP
 
.RE
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\fBParameters\fP
.RS 4
\fIM\fP 
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          M is INTEGER
          The number of rows of the matrix Q\&. M >= 0\&.
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\fIN\fP 
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          N is INTEGER
          The number of columns of the matrix Q\&. N >= M\&.
.fi
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.br
\fIK\fP 
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          K is INTEGER
          The number of elementary reflectors whose product defines the
          matrix Q\&. M >= K >= 0\&.
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.PP
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\fIA\fP 
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          A is DOUBLE PRECISION array, dimension (LDA,N)
          On entry, the (m-k+i)-th row must contain the vector which
          defines the elementary reflector H(i), for i = 1,2,\&.\&.\&.,k, as
          returned by DGERQF in the last k rows of its array argument
          A\&.
          On exit, the m by n matrix Q\&.
.fi
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.br
\fILDA\fP 
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          LDA is INTEGER
          The first dimension of the array A\&. LDA >= max(1,M)\&.
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\fITAU\fP 
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          TAU is DOUBLE PRECISION array, dimension (K)
          TAU(i) must contain the scalar factor of the elementary
          reflector H(i), as returned by DGERQF\&.
.fi
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\fIWORK\fP 
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          WORK is DOUBLE PRECISION array, dimension (M)
.fi
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.br
\fIINFO\fP 
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          INFO is INTEGER
          = 0: successful exit
          < 0: if INFO = -i, the i-th argument has an illegal value
.fi
.PP
 
.RE
.PP
\fBAuthor\fP
.RS 4
Univ\&. of Tennessee 
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Univ\&. of California Berkeley 
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Univ\&. of Colorado Denver 
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NAG Ltd\&. 
.RE
.PP

.PP
Definition at line \fB113\fP of file \fBdorgr2\&.f\fP\&.
.SH "Author"
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Generated automatically by Doxygen for LAPACK from the source code\&.