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- .th GRAPH VI 2/20/75
- .sh NAME
- graph \*- draw a graph
- .sh SYNOPSIS
- .bd graph
- [ option ] ... | plotter
- .sh DESCRIPTION
- .it 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
- .it plot
- (VI).
- These plotters exist:
- .it gsip,
- for the GSI and other Diablo terminals;
- .it tek,
- for the Tektronix 4014 terminal;
- and
- .it vt0
- for the on-line storage scope.
- .s3
- The following options are recognized,
- each as a separate argument.
- .s3
- .lp +5 5
- \fBa\fR 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.
- .s3
- .lp +5 5
- \fBc\fR Place character string given by next argument
- at each point.
- .s3
- .lp +5 5
- \fBd\fR Omit connections between points. (Disconnect.)
- .s3
- .lp +5 5
- \fBg\fIn\fR Grid
- style:
- .lp +5 0
- \fIn\fR=0, no grid
- .lp +5 0
- \fIn\fR=1, axes only
- .lp +5 0
- \fIn\fR=2, complete grid (default).
- .s3
- .lp +5 5
- \fBs\fR Save screen, don't erase before plotting.
- .s3
- .lp +5 5
- \fBx\fR Next 1 (or 2) arguments are lower (and upper) \fIx\fR limits.
- .s3
- .lp +5 5
- \fBy\fR Next 1 (or 2) arguments are lower (and upper)
- \fIy\fR limits.
- .s3
- .lp +5 5
- \fBh\fR Next argument is fraction of space for height
- .s3
- .lp +5 5
- \fBw\fR Next argument is fraction of space for width.
- .s3
- .lp +5 5
- \fBr\fR Next argument is fraction of space to move right before plotting.
- .s3
- .lp +5 5
- \fBu\fR Next argument is fraction of space to move up before plotting.
- .s3
- .i0
- 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 \fIx\fR 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
- .bd c
- are
- placed so that a small initial letter,
- such as + o x, will fall
- approximately on the plotting point.
- .sh "SEE ALSO"
- spline (VI), plot (VI)
- .sh BUGS
- A limit of 1000 points is enforced silently.
-