Scientific Operations



GRAPH(VI)                    2/20/75                    GRAPH(VI)



NAME
     graph - draw a graph

SYNOPSIS
     graph [ option ] ... | plotter

DESCRIPTION
     Graph  with no options takes pairs of numbers from the stan-
     dard input as abscissas and ordinates of a graph.  The graph
     is written on the standard output to be piped to the plotter
     program for a particular device; see plot(VI).  These plot-
     ters  exist:  gsip,  for the GSI and other Diablo terminals;
     tek, for the Tektronix 4014 terminal; and vt0  for  the  on-
     line storage scope.

     The following options are recognized, each as a separate ar-
     gument.

     a    Supply abscissas automatically (they are  missing  from
          the  input);  spacing is given by the next argument, or
          is assumed to be 1 if next argument is not a number.  A
          second  optional argument is the starting point for the
          automatic abscissa.

     c    Place character string given by next argument  at  each
          point.

     d    Omit connections between points. (Disconnect.)

     gn   Grid style:
          n=0, no grid
          n=1, axes only
          n=2, complete grid (default).

     s    Save screen, don't erase before plotting.

     x    Next 1 (or 2) arguments are lower (and upper) x limits.

     y    Next 1 (or 2) arguments are lower (and upper) y limits.

     h    Next argument is fraction of space for height

     w    Next argument is fraction of space for width.

     r    Next argument is fraction of space to move right before
          plotting.

     u    Next argument is fraction of space to  move  up  before
          plotting.

     Points  are connected by straight line segments in the order
     they appear in input.  If a specified  lower  limit  exceeds
     the  upper limit, or if the automatic increment is negative,
     the graph is plotted upside down.  Automatic abscissas begin
     with  the lower x limit, or with 0 if no limit is specified.


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GRAPH(VI)                    2/20/75                    GRAPH(VI)


     Grid lines and automatically determined limits fall on round
     values,  however roundness may be subverted by giving an in-
     appropriately rounded lower limit.  Plotting symbols  speci-
     fied by c are placed so that a small initial letter, such as
     + o x, will fall approximately on the plotting point.

SEE ALSO
     spline(VI), plot(VI)

BUGS
     A limit of 1000 points is enforced silently.















































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