claqhp.f man page on Oracle

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claqhp.f(3)			    LAPACK			   claqhp.f(3)

       claqhp.f -

       subroutine claqhp (UPLO, N, AP, S, SCOND, AMAX, EQUED)
	   CLAQHP scales a Hermitian matrix stored in packed form.

Function/Subroutine Documentation
   subroutine claqhp (characterUPLO, integerN, complex, dimension( * )AP,
       real, dimension( * )S, realSCOND, realAMAX, characterEQUED)
       CLAQHP scales a Hermitian matrix stored in packed form.


	    CLAQHP equilibrates a Hermitian matrix A using the scaling factors
	    in the vector S.


		     UPLO is CHARACTER*1
		     Specifies whether the upper or lower triangular part of the
		     Hermitian matrix A is stored.
		     = 'U':  Upper triangular
		     = 'L':  Lower triangular


		     N is INTEGER
		     The order of the matrix A.	 N >= 0.


		     AP is COMPLEX array, dimension (N*(N+1)/2)
		     On entry, the upper or lower triangle of the Hermitian matrix
		     A, packed columnwise in a linear array.  The j-th column of A
		     is stored in the array AP as follows:
		     if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j;
		     if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = A(i,j) for j<=i<=n.

		     On exit, the equilibrated matrix:	diag(S) * A * diag(S), in
		     the same storage format as A.


		     S is REAL array, dimension (N)
		     The scale factors for A.


		     SCOND is REAL
		     Ratio of the smallest S(i) to the largest S(i).


		     AMAX is REAL
		     Absolute value of largest matrix entry.


		     Specifies whether or not equilibration was done.
		     = 'N':  No equilibration.
		     = 'Y':  Equilibration was done, i.e., A has been replaced by
			     diag(S) * A * diag(S).

       Internal Parameters:

	     THRESH is a threshold value used to decide if scaling should be done
	     based on the ratio of the scaling factors.	 If SCOND < THRESH,
	     scaling is done.

	     LARGE and SMALL are threshold values used to decide if scaling should
	     be done based on the absolute size of the largest matrix element.
	     If AMAX > LARGE or AMAX < SMALL, scaling is done.

	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

	   September 2012

       Definition at line 127 of file claqhp.f.

       Generated automatically by Doxygen for LAPACK from the source code.

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

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