ZLASSQ(3F)							    ZLASSQ(3F)

NAME    [Toc]    [Back]

     ZLASSQ - return the values	scl and	ssq such that	( scl**2 )*ssq = x( 1
     )**2 +...+	x( n )**2 + ( scale**2 )*sumsq,

SYNOPSIS    [Toc]    [Back]

     SUBROUTINE	ZLASSQ(	N, X, INCX, SCALE, SUMSQ )

	 INTEGER	INCX, N

	 DOUBLE		PRECISION SCALE, SUMSQ

	 COMPLEX*16	X( * )

PURPOSE    [Toc]    [Back]

     ZLASSQ returns the	values scl and ssq such	that

     where x( i	) = abs( X( 1 +	( i - 1	)*INCX ) ). The	value of sumsq is
     assumed to	be at least unity and the value	of ssq will then satisfy

	1.0 .le. ssq .le. ( sumsq + 2*n	).

     scale is assumed to be non-negative and scl returns the value

	scl = max( scale, abs( real( x(	i ) ) ), abs( aimag( x(	i ) ) )	),
	       i

     scale and sumsq must be supplied in SCALE and SUMSQ respectively.	SCALE
     and SUMSQ are overwritten by scl and ssq respectively.

     The routine makes only one	pass through the vector	X.

ARGUMENTS    [Toc]    [Back]

     N	     (input) INTEGER
	     The number	of elements to be used from the	vector X.

     X	     (input) DOUBLE PRECISION
	     The vector	x as described above.  x( i )  = X( 1 +	( i - 1	)*INCX
	     ),	1 <= i <= n.

     INCX    (input) INTEGER
	     The increment between successive values of	the vector X.  INCX >
	     0.

     SCALE   (input/output) DOUBLE PRECISION
	     On	entry, the value  scale	 in the	equation above.	 On exit,
	     SCALE is overwritten with the value  scl .

     SUMSQ   (input/output) DOUBLE PRECISION
	     On	entry, the value  sumsq	 in the	equation above.	 On exit,
	     SUMSQ is overwritten with the value  ssq .
ZLASSQ(3F)							    ZLASSQ(3F)

NAME    [Toc]    [Back]

     ZLASSQ - return the values	scl and	ssq such that	( scl**2 )*ssq = x( 1
     )**2 +...+	x( n )**2 + ( scale**2 )*sumsq,

SYNOPSIS    [Toc]    [Back]

     SUBROUTINE	ZLASSQ(	N, X, INCX, SCALE, SUMSQ )

	 INTEGER	INCX, N

	 DOUBLE		PRECISION SCALE, SUMSQ

	 COMPLEX*16	X( * )

PURPOSE    [Toc]    [Back]

     ZLASSQ returns the	values scl and ssq such	that

     where x( i	) = abs( X( 1 +	( i - 1	)*INCX ) ). The	value of sumsq is
     assumed to	be at least unity and the value	of ssq will then satisfy

	1.0 .le. ssq .le. ( sumsq + 2*n	).

     scale is assumed to be non-negative and scl returns the value

	scl = max( scale, abs( real( x(	i ) ) ), abs( aimag( x(	i ) ) )	),
	       i

     scale and sumsq must be supplied in SCALE and SUMSQ respectively.	SCALE
     and SUMSQ are overwritten by scl and ssq respectively.

     The routine makes only one	pass through the vector	X.

ARGUMENTS    [Toc]    [Back]

     N	     (input) INTEGER
	     The number	of elements to be used from the	vector X.

     X	     (input) DOUBLE PRECISION
	     The vector	x as described above.  x( i )  = X( 1 +	( i - 1	)*INCX
	     ),	1 <= i <= n.

     INCX    (input) INTEGER
	     The increment between successive values of	the vector X.  INCX >
	     0.

     SCALE   (input/output) DOUBLE PRECISION
	     On	entry, the value  scale	 in the	equation above.	 On exit,
	     SCALE is overwritten with the value  scl .

     SUMSQ   (input/output) DOUBLE PRECISION
	     On	entry, the value  sumsq	 in the	equation above.	 On exit,
	     SUMSQ is overwritten with the value  ssq .


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