lsd_mkb/lsd_mkb_superlu/superlu_seq/icmax1.c File Reference

Finds the index of the element whose real part has maximum absolute value. More...

#include <math.h>
#include "slu_scomplex.h"
#include "slu_Cnames.h"

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Defines
#define	CX(I)   cx[(I)-1]
Functions
int	icmax1_ (int *n, complex *cx, int *incx)

---

Detailed Description

Finds the index of the element whose real part has maximum absolute value.

     -- LAPACK auxiliary routine (version 2.0) --   
     Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd.,   
     Courant Institute, Argonne National Lab, and Rice University   
     October 31, 1992   
 

---

Define Documentation

#define CX

(

I

)

cx[(I)-1]

---

Function Documentation

int icmax1_	(	int *	n,
		complex *	cx,
		int *	incx
	)

    Purpose   
    =======

    ICMAX1 finds the index of the element whose real part has maximum   
    absolute value.

    Based on ICAMAX from Level 1 BLAS.   
    The change is to use the 'genuine' absolute value.

    Contributed by Nick Higham for use with CLACON.

    Arguments   
    =========

    N       (input) INT   
            The number of elements in the vector CX.

    CX      (input) COMPLEX array, dimension (N)   
            The vector whose elements will be summed.

    INCX    (input) INT   
            The spacing between successive values of CX.  INCX >= 1.

   ===================================================================== 
  

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