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1.1 root 1: .TH GRAPH 1
2: .CT 1 numbers graphics
3: .SH NAME
4: graph \- draw a graph
5: .SH SYNOPSIS
6: .B graph
7: [
8: .I option ...
9: ]
10: .SH DESCRIPTION
11: .I Graph
12: with no options takes pairs of numbers from the
13: standard input as abscissas
14: .RI ( x -values)
15: and ordinates
16: .RI ( y -values)
17: of a graph.
18: Successive points are connected by straight lines.
19: The graph is encoded on the standard output
20: for display by
21: .IR plot (1)
22: filters.
23: .PP
24: If the ordinate of a point is followed by
25: a nonnumeric string, that string is printed as a
26: label beginning on the point.
27: Labels may be surrounded with quotes
28: .L
29: " "
30: in which case they may be empty or contain blanks
31: and numbers;
32: labels never contain newlines.
33: .PP
34: The following options are recognized,
35: each as a separate argument.
36: .TP
37: .B -a
38: Supply abscissas automatically; no
39: .IR x -values
40: appear in the input.
41: Spacing is given by the next
42: argument (default 1).
43: A second optional argument is the starting point for
44: automatic abscissas (default 0, or 1
45: with a log scale in
46: .I x,
47: or the lower limit given by
48: .BR -x ).
49: .TP
50: .B -b
51: Break (disconnect) the graph after each label in the input.
52: .TP
53: .B -c
54: Character string given by next argument
55: is default label for each point.
56: .TP
57: .B -g
58: Next argument is grid style,
59: 0 no grid, 1 frame with ticks, 2 full grid (default).
60: .TP
61: .B -l
62: Next argument is a legend to title the graph.
63: Grid ranges
64: are automatically printed as part
65: of the title unless a
66: .B -s
67: option is present.
68: .TP
69: .B -m
70: Next argument is mode (style)
71: of connecting lines:
72: 0 disconnected, 1 connected.
73: Some devices give distinguishable line styles
74: for other small integers.
75: Mode \-1 (default) begins with style 1 and
76: rotates styles for successive curves under option
77: .BR -o .
78: .TP
79: .B -o
80: (Overlay.)
81: The ordinates for
82: .I n
83: superposed curves appear in the input
84: with each abscissa value.
85: The next argument is
86: .IR n .
87: .TP
88: .B -s
89: Save screen; no new page for this graph.
90: .TP
91: .B -x l
92: If
93: .B l
94: is present,
95: .IR x -axis
96: is logarithmic.
97: Next 1 (or 2) arguments are lower (and upper)
98: .I x
99: limits.
100: Third argument, if present, is grid spacing on
101: .I x
102: axis.
103: Normally these quantities are determined automatically.
104: .TP
105: .B -y l
106: Similarly for
107: .IR y .
108: .TP
109: .B -e
110: Make automatically determined
111: .I x
112: and
113: .I y
114: scales equal.
115: .TP
116: .B -h
117: Next argument is fraction of space for height.
118: .TP
119: .B -w
120: Similarly for width.
121: .TP
122: .B -r
123: Next argument is fraction of space to move right before plotting.
124: .TP
125: .B -u
126: Similarly to move up before plotting.
127: .TP
128: .B -t
129: Transpose horizontal and vertical axes.
130: (Option
131: .B -a
132: now applies to the vertical axis.)
133: .PP
134: If a specified lower limit exceeds the upper limit,
135: the axis
136: is reversed.
137: .SH "SEE ALSO"
138: .IR plot (1),
139: .IR grap (1),
140: .IR spline (A)
141: .SH BUGS
142: In
143: .I graph
144: segments that run out of bounds are dropped, not windowed.
145: .br
146: Logarithmic axes may not be reversed.
147: .br
148: Option
149: .B -e
150: actually makes automatic limits, rather than automatic scaling,
151: equal.
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