.TH "rotm" 3 "Version 3.12.0" "LAPACK" \" -*- nroff -*-
.ad l
.nh
.SH NAME
rotm \- rotm: apply modified (fast) plane rotation
.SH SYNOPSIS
.br
.PP
.SS "Functions"

.in +1c
.ti -1c
.RI "subroutine \fBdrotm\fP (n, dx, incx, dy, incy, dparam)"
.br
.RI "\fBDROTM\fP "
.ti -1c
.RI "subroutine \fBsrotm\fP (n, sx, incx, sy, incy, sparam)"
.br
.RI "\fBSROTM\fP "
.in -1c
.SH "Detailed Description"
.PP 

.SH "Function Documentation"
.PP 
.SS "subroutine drotm (integer n, double precision, dimension(*) dx, integer incx, double precision, dimension(*) dy, integer incy, double precision, dimension(5) dparam)"

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

.PP
.nf
!>
!>    APPLY THE MODIFIED GIVENS TRANSFORMATION, H, TO THE 2 BY N MATRIX
!>
!>    (DX**T) , WHERE **T INDICATES TRANSPOSE\&. THE ELEMENTS OF DX ARE IN
!>    (DY**T)
!>
!>    DX(LX+I*INCX), I = 0 TO N-1, WHERE LX = 1 IF INCX \&.GE\&. 0, ELSE
!>    LX = (-INCX)*N, AND SIMILARLY FOR SY USING LY AND INCY\&.
!>    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)\&.
!>    SEE DROTMG FOR A DESCRIPTION OF DATA STORAGE IN DPARAM\&.
!> 
.fi
.PP
 
.RE
.PP
\fBParameters\fP
.RS 4
\fIN\fP 
.PP
.nf
!>          N is INTEGER
!>         number of elements in input vector(s)
!> 
.fi
.PP
.br
\fIDX\fP 
.PP
.nf
!>          DX is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
!> 
.fi
.PP
.br
\fIINCX\fP 
.PP
.nf
!>          INCX is INTEGER
!>         storage spacing between elements of DX
!> 
.fi
.PP
.br
\fIDY\fP 
.PP
.nf
!>          DY is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCY ) )
!> 
.fi
.PP
.br
\fIINCY\fP 
.PP
.nf
!>          INCY is INTEGER
!>         storage spacing between elements of DY
!> 
.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 \fB95\fP of file \fBdrotm\&.f\fP\&.
.SS "subroutine srotm (integer n, real, dimension(*) sx, integer incx, real, dimension(*) sy, integer incy, real, dimension(5) sparam)"

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

.PP
.nf
!>
!>    APPLY THE MODIFIED GIVENS TRANSFORMATION, H, TO THE 2 BY N MATRIX
!>
!>    (SX**T) , WHERE **T INDICATES TRANSPOSE\&. THE ELEMENTS OF SX ARE IN
!>    (SX**T)
!>
!>    SX(LX+I*INCX), I = 0 TO N-1, WHERE LX = 1 IF INCX \&.GE\&. 0, ELSE
!>    LX = (-INCX)*N, AND SIMILARLY FOR SY USING USING LY AND INCY\&.
!>    WITH SPARAM(1)=SFLAG, H HAS ONE OF THE FOLLOWING FORMS\&.\&.
!>
!>    SFLAG=-1\&.E0     SFLAG=0\&.E0        SFLAG=1\&.E0     SFLAG=-2\&.E0
!>
!>      (SH11  SH12)    (1\&.E0  SH12)    (SH11  1\&.E0)    (1\&.E0  0\&.E0)
!>    H=(          )    (          )    (          )    (          )
!>      (SH21  SH22),   (SH21  1\&.E0),   (-1\&.E0 SH22),   (0\&.E0  1\&.E0)\&.
!>    SEE  SROTMG FOR A DESCRIPTION OF DATA STORAGE IN SPARAM\&.
!>
!> 
.fi
.PP
 
.RE
.PP
\fBParameters\fP
.RS 4
\fIN\fP 
.PP
.nf
!>          N is INTEGER
!>         number of elements in input vector(s)
!> 
.fi
.PP
.br
\fISX\fP 
.PP
.nf
!>          SX is REAL array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
!> 
.fi
.PP
.br
\fIINCX\fP 
.PP
.nf
!>          INCX is INTEGER
!>         storage spacing between elements of SX
!> 
.fi
.PP
.br
\fISY\fP 
.PP
.nf
!>          SY is REAL array, dimension ( 1 + ( N - 1 )*abs( INCY ) )
!> 
.fi
.PP
.br
\fIINCY\fP 
.PP
.nf
!>          INCY is INTEGER
!>         storage spacing between elements of SY
!> 
.fi
.PP
.br
\fISPARAM\fP 
.PP
.nf
!>          SPARAM is REAL array, dimension (5)
!>     SPARAM(1)=SFLAG
!>     SPARAM(2)=SH11
!>     SPARAM(3)=SH21
!>     SPARAM(4)=SH12
!>     SPARAM(5)=SH22
!> 
.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 \fB96\fP of file \fBsrotm\&.f\fP\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for LAPACK from the source code\&.