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PMKA2

       SUBROUTINE  PMKA2 (XARRAY,INCX,YARRAY,INCY,N)
 C$    (Polymarker Absolute 2-D)
 C$    Beginning at the current point, draw markers at each of the
 C$    N points stored in (XARRAY(*),YARRAY(*)) in turn, ending at
 C$    the N-th point which will become the new current  position.
 C$    INCX and INCY  are the displacements  between successive  X
 C$    and Y values in the arrays.  These will normally be both 1.
 C$    The marker used  will be  that currently  selected.  If  an
 C$    increment INCX or INCY is negative, the starting vertex  is
 C$    taken as (1-N)*INC + 1 instead  of 1, so that the array  is
 C$    stepped through in reverse order.
 C$    (02-APR-82)