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srotmg.f(3)			    LAPACK			   srotmg.f(3)

NAME
       srotmg.f -

SYNOPSIS
   Functions/Subroutines
       subroutine srotmg (SD1, SD2, SX1, SY1, SPARAM)
	   SROTMG

Function/Subroutine Documentation
   subroutine srotmg (realSD1, realSD2, realSX1, realSY1, real,
       dimension(5)SPARAM)
       SROTMG Purpose:

	       CONSTRUCT THE MODIFIED GIVENS TRANSFORMATION MATRIX H WHICH ZEROS
	       THE SECOND COMPONENT OF THE 2-VECTOR  (SQRT(SD1)*SX1,SQRT(SD2)*>	   SY2)**T.
	       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).
	       LOCATIONS 2-4 OF SPARAM CONTAIN SH11,SH21,SH12, AND SH22
	       RESPECTIVELY. (VALUES OF 1.E0, -1.E0, OR 0.E0 IMPLIED BY THE
	       VALUE OF SPARAM(1) ARE NOT STORED IN SPARAM.)

	       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 SD1 AND SD2.	ALL ACTUAL SCALING OF DATA IS DONE USING GAM.

       Parameters:
	   SD1

		     SD1 is REAL

	   SD2

		     SD2 is REAL

	   SX1

		     SX1 is REAL

	   SY1

		     SY1 is REAL

	   SPARAM

		     SPARAM is REAL array, dimension 5
		SPARAM(1)=SFLAG
		SPARAM(2)=SH11
		SPARAM(3)=SH21
		SPARAM(4)=SH12
		SPARAM(5)=SH22

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Definition at line 91 of file srotmg.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2			Tue Sep 25 2012			   srotmg.f(3)

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