rotm(3F)

NAME
     drotm, srotm - BLAS Level-1. Applies a modified Givens rotation.

FORTRAN SYNOPSIS
     subroutine drotm( n, x, incx, y, incy, param )
     integer            n, incx, incy
     double precision   x( (n-1)*|incx|+1 ), y( (n-1)*|incy|+1 )
     double precision   param( 5 )

     subroutine srotm( n, x, incx, y, incy, param )
     integer            n, incx, incy
     real               x( (n-1)*|incx|+1 ), y( (n-1)*|incy|+1 )
     real               param( 5 )


DESCRIPTION
     DROTM and SROTM apply the modified Givens rotation computed by drotmg or
     srotmg.


PARAMETERS
     n       (input)
             Number of planar points to be rotated. If n<=0, the routine
             returns without any computattion.

     x       (input/output)
             On input, x contains the x-coordinate of each planar point to be
             rotated.
             On output, x contains the x-coordinate of each rotated planar
             point.

     incx    (input)
             Increment between elemnents of x.
             If incx=0, the results will be unpredictable.

     y       (input/output)
             On input, y contains the y-coordinate of each planer point to be
             rotated.
             On output, y contains the y-coordinate of each rotated planar
             point.

     incy    (input)
             Increment between elemnents of y.
             If incy=0, the results will be unpredictable.

     param   (output)
             This array contains rotation matrix information.
SEE ALSO
     DROTMG or SROTMG.