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NAME
     idamax - Return the index of the element with largest  abso-
     lute value.

SYNOPSIS
     INTEGER FUNCTION IDAMAX (N, X, INCX)

     INTEGER INCX, N

     DOUBLE PRECISION    X( * )



     #include <sunperf.h>

     int idamax(int n, double *dx, int incx) ;

PURPOSE
     IDAMAX - Return the index of the element in x  with  largest
     absolute value where x is an n-vector.


PARAMETERS
     N         - INTEGER.
               On entry, N specifies the number  of  elements  in
               the  vector.   N must be at least one for the sub-
               routine to have any visible effect.  Unchanged  on
               exit.

     X         - DOUBLE PRECISION array of DIMENSION at least
               ( 1 + ( m - 1 )*abs( INCX  )  ).   On  entry,  the
               incremented  array  X  must  contain the vector x.
               Unchanged on exit.

     INCX      - INTEGER.
               On entry, INCX specifies  the  increment  for  the
               elements  of X.  INCX must be positive.  Unchanged
               on exit.

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