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VEC_$AMAX                         Domain/OS                          VEC_$AMAX


NAME
     vec_$amax - find the maximum absolute value in a single-precision vector

SYNOPSIS (C)
     #include <apollo/base.h>
     #include <apollo/vec.h>

     long int vec_$amax(
          float *start_vec,
          long int &length,
          float *result)

SYNOPSIS (Pascal)
     %include '/sys/ins/base.ins.pas';
     %include '/sys/ins/vec.ins.pas';

     function vec_$amax(
          in start_vec: univ vec_$real_vector;
          in length: integer32;
          out result: real): integer32;

SYNOPSIS (FORTRAN)
     %include '/sys/ins/base.ins.ftn'
     %include '/sys/ins/vec.ins.ftn'

           parameter (nvec = 10)

           real start_vec(nvec), result
           integer*4 length, location

           location = vec_$amax(start_vec, length, result)

DESCRIPTION
     Vec_$amax searches through length elements of start_vec, places the
     greatest absolute-valued element in result, and returns the location of
     the element with the greatest absolute value. By contrast, vec_$rmax
     finds the element with greatest signed value.  (The procedure vec_$max is
     obsolete and should not be used.)  In the case of a tie, vec_$amax
     returns the index of the first maximum value found.

     start_vec
          The vector to be searched.

     length
          The number of elements to be operated on;  normally the same as the
          number of elements in the vectors.

     result
          The value of the greatest element in start_vec.

NOTES
     In C and Pascal, vec_$amax searches a row vector; in FORTRAN, it searches
     a column vector.


SEE ALSO
     vec_$rmax, vec_$rmin, vec_$amin, vec_$amax_i, vec_$damax, vec_$damax_i,
     vec_$iamax, vec_$iamax_i, vec_$iamax16, vec_$iamax16_i.