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

.in +1c
.ti -1c
.RI "subroutine \fBdrotmg\fP (dd1, dd2, dx1, dy1, dparam)"
.br
.RI "\fBDROTMG\fP "
.in -1c
.SH "Function/Subroutine Documentation"
.PP 
.SS "subroutine drotmg (double precision dd1, double precision dd2, double precision dx1, double precision dy1, double precision, dimension(5) dparam)"

.PP
\fBDROTMG\fP 
.PP
\fBPurpose:\fP
.RS 4

.PP
.nf
!>
!>    CONSTRUCT THE MODIFIED GIVENS TRANSFORMATION MATRIX H WHICH ZEROS
!>    THE SECOND COMPONENT OF THE 2-VECTOR  (DSQRT(DD1)*DX1,DSQRT(DD2)*>    DY2)**T\&.
!>    WITH DPARAM(1)=DFLAG, H HAS ONE OF THE FOLLOWING FORMS\&.\&.
!>
!>    DFLAG=-1\&.D0     DFLAG=0\&.D0        DFLAG=1\&.D0     DFLAG=-2\&.D0
!>
!>      (DH11  DH12)    (1\&.D0  DH12)    (DH11  1\&.D0)    (1\&.D0  0\&.D0)
!>    H=(          )    (          )    (          )    (          )
!>      (DH21  DH22),   (DH21  1\&.D0),   (-1\&.D0 DH22),   (0\&.D0  1\&.D0)\&.
!>    LOCATIONS 2-4 OF DPARAM CONTAIN DH11, DH21, DH12, AND DH22
!>    RESPECTIVELY\&. (VALUES OF 1\&.D0, -1\&.D0, OR 0\&.D0 IMPLIED BY THE
!>    VALUE OF DPARAM(1) ARE NOT STORED IN DPARAM\&.)
!>
!>    THE VALUES OF GAMSQ AND RGAMSQ SET IN THE DATA STATEMENT MAY BE
!>    INEXACT\&.  THIS IS OK AS THEY ARE ONLY USED FOR TESTING THE SIZE
!>    OF DD1 AND DD2\&.  ALL ACTUAL SCALING OF DATA IS DONE USING GAM\&.
!>
!> 
.fi
.PP
 
.RE
.PP
\fBParameters\fP
.RS 4
\fIDD1\fP 
.PP
.nf
!>          DD1 is DOUBLE PRECISION
!> 
.fi
.PP
.br
\fIDD2\fP 
.PP
.nf
!>          DD2 is DOUBLE PRECISION
!> 
.fi
.PP
.br
\fIDX1\fP 
.PP
.nf
!>          DX1 is DOUBLE PRECISION
!> 
.fi
.PP
.br
\fIDY1\fP 
.PP
.nf
!>          DY1 is DOUBLE PRECISION
!> 
.fi
.PP
.br
\fIDPARAM\fP 
.PP
.nf
!>          DPARAM is DOUBLE PRECISION array, dimension (5)
!>     DPARAM(1)=DFLAG
!>     DPARAM(2)=DH11
!>     DPARAM(3)=DH21
!>     DPARAM(4)=DH12
!>     DPARAM(5)=DH22
!> 
.fi
.PP
 
.RE
.PP
\fBAuthor\fP
.RS 4
Univ\&. of Tennessee 

.PP
Univ\&. of California Berkeley 

.PP
Univ\&. of Colorado Denver 

.PP
NAG Ltd\&. 
.RE
.PP

.PP
Definition at line \fB89\fP of file \fBdrotmg\&.f\fP\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for LAPACK from the source code\&.