Name: GRAF    6
GRAF plots a two-dimensional axis system.                level 1
The call is:  CALL GRAF (XA, XE, XOR, XSTEP, YA, YE, YOR, YSTEP)
         or:  void graf (float xa, float xe, float xor, float x-
              step, float ya, float ye, float yor, float ystep); 
XA, XE        are the lower and upper limits of the X-axis.
XOR, XSTEP    are the first X-axis label  and  the step  between
              labels.
YA, YE        are the lower and upper limits of the Y-axis.
YOR, YSTEP    are the first  Y-axis label  and the step  between
              labels.
Notes:      - GRAF must be called in  level 1 and  automatically
              sets the level to 2.  When  plotting  more  than 1
              axis system  on a page,  ENDGRF must be  called in
              between  each new set of axes in order  to set the
              level back to 1.
            - The axis scaling is linear  by default  and can be
              changed with SCALE.  For logarithmic scaling,  the
              corresponding parameters in GRAF must be exponents
              of base 10.
            - If the  numerical value  of the lower limit of  an
              axis is larger  than the upper limit and the label
              step is negative,  axis scaling will be in descen-
              ding order.
Name: POLAR   6
The routine POLAR plots a two-dimensional polar axis system.
The call is:  CALL POLAR (XE, XOR, XSTEP, YOR, YSTEP)    level 1
         or:  void polar (float xe, float xor, float xstep,
                          float yor, float ystep);
XE            is upper limit  of the X-axis (radius coordinate).
XOR, XSTEP    are the first  X-axis label  and the  step between
              labels.
YOR, YSTEP    are the first  Y-axis label  and the  step between
              labels specified in degrees.  The Y-axis is scaled
              from 0 to 360 degrees.
Note:         The direction and position of the angle labels can
              be modified with the routine POLMOD.
Name: ENDGRF  2,6
The routine ENDGRF terminates an axis system  and sets the level
to 1. This routine must be called when plotting more than 1 axis
system on a page.
The call is:  CALL ENDGRF                             level 2, 3
         or:  void endgrf ();
Name: AXGIT   6
AXGIT  plots  vertical  and  horizontal  lines through X = 0 and
Y = 0 in an axis system.
The call is:  CALL AXGIT                              level 2, 3
         or:  void axgit (); 
Name: XAXGIT  6
XAXGIT plots a horizontal line through Y = 0 in an axis system.
The call is:  CALL XAXGIT                             level 2, 3
         or:  void xaxgit ();
Name: YAXGIT  6
YAXGIT plots a vertical line through X = 0 in an axis system.
The call is:  CALL YAXGIT                             level 2, 3
         or:  void yaxgit ();
Name: CROSS   6
CROSS plots vertical and horizontal lines with additional  ticks 
through X = 0 and Y = 0 in an axis system.
The call is:  CALL CROSS                              level 2, 3
         or:  void cross ();
Name: XCROSS  6
XCROSS  plots a  horizontal  line with additional  ticks through
Y = 0 in an axis system.
The call is:  CALL XCROSS                             level 2, 3
         or:  void xcross ();
Name: YCROSS  6
YCROSS  plots a  vertical  line  with additional  ticks  through
X = 0 in an axis system.
The call is:  CALL YCROSS                             level 2, 3
         or:  void ycross ();
Name: GRDPOL  6
The routine GRDPOL plots a polar grid.
The call is:  CALL GRDPOL (IXGRID, IYGRID)            level 2, 3
         or:  void grdpol (int ixgrd, int iygrd);
IXGRID        is the numbers of circles between labels.
YGRID         is the numbers of sector lines between 360 de-
              grees.
Name: GRID    6
GRID overlays a grid on an axis system.
The call is:  CALL GRID (IXGRD, IYGRD)                level 2, 3
         or:  void grid (int ixgrd, int iygrd);
IXGRD, IYGRD  are the numbers of grid lines between labels.
Name: BOX2D   6
The routine  BOX2D  plots a  border  around  an axis system  (or
around the rectangle defined by AXSPOS and AXSLEN).
The call is:  CALL BOX2D                           level 1, 2, 3
         or:  void box2d ();
Name: TITLE   6
TITLE plots a title over an axis system.  The title may  contain
up to four lines of text designated with TITLIN.
The call is:  CALL TITLE                              level 2, 3
         or:  void title (); 
Name: ADDLAB  6
Additional  single labels  can be plotted on an axis system with
the routine ADDLAB.
The call is:  CALL ADDLAB (CSTR, V, ITIC, CAX)        level 2, 3
         or:  void addlab (char *cstr, float v, int itic,
                           char *cax);
CSTR          is a character string containing a label.
V             is an user  coordinate that defines the axis posi-
              tion of the label.
ITIC          is an integer option  that  defines if a tick mark
              is plotted.  ITIC = 0 means  that no tick is plot-
              ted,  ITIC = 1 defines a minor tick and  ITICK = 2
              defines a major tick.
CAX           is a  character string  that defines the axis. CAX
              can have the values   'X',  'Y',  'Z',  'XTOP' and 
              'YLEFT'.
Name: XAXIS   7
XAXIS plots a linear X-axis.                       level 1, 2, 3
The call is:  CALL XAXIS (A, B, OR, STP, NL, CSTR, IT, NX, NY)
         or:  void xaxis (float a, float b, float or, float stp,
                    int nl, char *cstr, int it, int nx, int ny);   
A, B          are the upper and lower limits of the axis.
OR, STP       are the label and the step between labels.
NL            is the length of the axis in plot coordinates.
CSTR          is a character string containing the axis name.
IT            indicates how ticks,  labels and the axis name are
              plotted.  If IT = 0,  they are plotted in a clock-
              wise direction.  If IT = 1, they are plotted in an
              counter-clockwise direction.
NX, NY        are the  plot coordinates of the axis start point.
              The X-axis will be plotted from left to right.
Name: YAXIS   7
YAXIS plots a linear Y axis.                       level 1, 2, 3
The call is:  CALL YAXIS (A, B, OR, STP, NL, CSTR, IT, NX, NY)
         or:  void yaxis (float a, float b, float or, float stp,
                    int nl, char *cstr, int it, int nx, int ny);   
A, B          are the upper and lower limits of the axis.
OR, STP       are the label and the step between labels.
NL            is the length of the axis in plot coordinates.
CSTR          is a character string containing the axis name.
IT            indicates how ticks,  labels and the axis name are
              plotted.  If IT = 0,  they are plotted in a clock-
              wise direction.  If IT = 1, they are plotted in an
              counter-clockwise direction.
NX, NY        are the  plot coordinates of the axis start point.
              The Y-axis will be plotted from bottom to top.
Name: XAXLG   7
XAXLG plots a logarithmic X-axis.                  level 1, 2, 3
The call is:  CALL XAXLG (A, B, OR, STP, NL, CSTR, IT, NX, NY)
         or:  void xaxlg (float a, float b, float or, float stp,
                    int nl, char *cstr, int it, int nx, int ny);   
A, B          are the upper and lower limits of the axis.
OR, STP       are the label and the step between labels.
NL            is the length of the axis in plot coordinates.
CSTR          is a character string containing the axis name.
IT            indicates how ticks,  labels and the axis name are
              plotted.  If IT = 0,  they are plotted in a clock-
              wise direction.  If IT = 1, they are plotted in an
              counter-clockwise direction.
NX, NY        are the  plot coordinates of the axis start point.
              The X-axis will be plotted from left to right.
Name: YAXLG   7
YAXLG plots a logarithmic Y-axis.                  level 1, 2, 3
The call is:  CALL YAXLG (A, B, OR, STP, NL, CSTR, IT, NX, NY)
         or:  void yaxlg (float a, float b, float or, float stp,
                    int nl, char *cstr, int it, int nx, int ny);   
A, B          are the upper and lower limits of the axis.
OR, STP       are the label and the step between labels.
NL            is the length of the axis in plot coordinates.
CSTR          is a character string containing the axis name.
IT            indicates how ticks,  labels and the axis name are
              plotted.  If IT = 0,  they are plotted in a clock-
              wise direction.  If IT = 1, they are plotted in an
              counter-clockwise direction.
NX, NY        are the  plot coordinates of the axis start point.
              The Y-axis will be plotted from bottom to top.
