CLARTG man page on Oracle

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clartg.f(3)			    LAPACK			   clartg.f(3)

       clartg.f -

       subroutine clartg (F, G, CS, SN, R)
	   CLARTG generates a plane rotation with real cosine and complex

Function/Subroutine Documentation
   subroutine clartg (complexF, complexG, realCS, complexSN, complexR)
       CLARTG generates a plane rotation with real cosine and complex sine.


	    CLARTG generates a plane rotation so that

	       [  CS  SN  ]	[ F ]	  [ R ]
	       [  __	  ]  .	[   ]  =  [   ]	  where CS**2 + |SN|**2 = 1.
	       [ -SN  CS  ]	[ G ]	  [ 0 ]

	    This is a faster version of the BLAS1 routine CROTG, except for
	    the following differences:
	       F and G are unchanged on return.
	       If G=0, then CS=1 and SN=0.
	       If F=0, then CS=0 and SN is chosen so that R is real.


		     F is COMPLEX
		     The first component of vector to be rotated.


		     G is COMPLEX
		     The second component of vector to be rotated.


		     CS is REAL
		     The cosine of the rotation.


		     SN is COMPLEX
		     The sine of the rotation.


		     R is COMPLEX
		     The nonzero component of the rotated vector.

	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

	   September 2012

       Further Details:

	     3-5-96 - Modified with a new algorithm by W. Kahan and J. Demmel

	     This version has a few statements commented out for thread safety
	     (machine parameters are computed on each entry). 10 feb 03, SJH.

       Definition at line 104 of file clartg.f.

       Generated automatically by Doxygen for LAPACK from the source code.

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

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