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





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

     standard  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 plotters 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

     argument.



     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.

     Grid lines and automatically determined limits fall on round

     values, however roundness may  be  subverted  by  giving  an

     inappropriately   rounded  lower  limit.   Plotting  symbols

     specified 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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