VEC_$IASUM16_I                    Domain/OS                     VEC_$IASUM16_I


NAME
     vec_$iasum16_i - sum the absolute value of the elements of a 16-bit
     integer vector

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

     long int vec_$iasum16_i(
          short int *vector,
          long int &vec_inc,
          long int &length)

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

     function vec_$iasum16_i(
          in vector: univ vec_$integer16_vector;
          in vec_inc: integer32;
          in length: integer32): integer32;

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

           parameter (nvec = 10)

           integer*2 vector(nvec), sum
           integer*4 length, vec_inc

           sum = vec_$iasum16_i(vector, vec_inc, length)

DESCRIPTION
     Vec_$iasum16_i adds together the absolute value of length elements of the
     16-bit integer array vector and returns the sum.

     This call, like all vec_$ calls ending in _i, takes a set of extra stride
     arguments, one for every vector argument.  The stride arguments determine
     which elements in the array are actually processed.  For instance, if the
     stride for a particular array is set to 3, every third element in the
     array will be processed by the routine.  The stride arguments need not be
     identical.  If all stride arguments are set to 1, this call behaves
     exactly like the version without the _i in its name.

     vector
          The vector to be summed.

     vec_inc
          The stride for vector.

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

NOTES
     When vec_$iasum16_i is used to operate on matrixes in C and Pascal, vec-
     tor is a row vector; in FORTRAN, it is a column vector.

     Vec_$iasum16_i, like all 16-bit integer routines, performs poorly when
     compared to the 32-bit integer routines.  Its use should be avoided wher-
     ever possible, especially on high-performance workstations.

SEE ALSO
     vec_$sum, vec_$norm, vec_$dot, vec_$asum, vec_$asum_i, vec_$dasum,
     vec_$dasum_i, vec_$iasum, vec_$iasum_i, vec_$iasum16.