.TH "dorg2r.f" 3 "Wed Oct 15 2014" "Version 3.4.2" "LAPACK" \" -*- nroff -*-
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.SH NAME
dorg2r.f \- 
.SH SYNOPSIS
.br
.PP
.SS "Functions/Subroutines"

.in +1c
.ti -1c
.RI "subroutine \fBdorg2r\fP (M, N, K, A, LDA, TAU, WORK, INFO)"
.br
.RI "\fI\fBDORG2R\fP generates all or part of the orthogonal matrix Q from a QR factorization determined by sgeqrf (unblocked algorithm)\&. \fP"
.in -1c
.SH "Function/Subroutine Documentation"
.PP 
.SS "subroutine dorg2r (integerM, integerN, integerK, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )TAU, double precision, dimension( * )WORK, integerINFO)"

.PP
\fBDORG2R\fP generates all or part of the orthogonal matrix Q from a QR factorization determined by sgeqrf (unblocked algorithm)\&.  
.PP
\fBPurpose: \fP
.RS 4

.PP
.nf
 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.
.fi
.PP
 
.RE
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\fBParameters:\fP
.RS 4
\fIM\fP 
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.nf
          M is INTEGER
          The number of rows of the matrix Q. M >= 0.
.fi
.PP
.br
\fIN\fP 
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          N is INTEGER
          The number of columns of the matrix Q. M >= N >= 0.
.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. N >= K >= 0.
.fi
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\fIA\fP 
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          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.
.fi
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\fILDA\fP 
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          LDA is INTEGER
          The first dimension of the array A. LDA >= max(1,M).
.fi
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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 DGEQRF.
.fi
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\fIWORK\fP 
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          WORK is DOUBLE PRECISION array, dimension (N)
.fi
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\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
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.RE
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\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
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\fBDate:\fP
.RS 4
September 2012 
.RE
.PP

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Definition at line 115 of file dorg2r\&.f\&.
.SH "Author"
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Generated automatically by Doxygen for LAPACK from the source code\&.