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man pages->IRIX man pages -> libblas/rotm (3)
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### Contents

```
_ROTM(3F)							     _ROTM(3F)

```

### NAME[Toc][Back]

```     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[Toc][Back]

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

```

### PARAMETERS[Toc][Back]

```     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.

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_ROTM(3F)							     _ROTM(3F)