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graph - compile graphs into pic input


graph [ options ] [ filename ... ]


graph is a perl script which takes sets of X Y data and generates a (human readable) pic program that will produce the graphed data. The output is designed such that you can save it in a file and tweak it to make it fit your document. Try one and look at the output. The output is actually commented.

The graph is autosized and auto ticked.

The input data format is similar that of xgraph(1) , i.e.,

1 1
2 2
3 3
"sloped across
1 4
2 4
3 4
"straight across

Control Options

You may set the graph title, the X title, and the Y title with the following control sequences in the data stream:

%T Graph title in +4 point font
%X X axis title and/or units in +2 point font
%Y Y axis title and/or units in +2 point font
%fakemax-X <value>     force graph to be that big
%fakemax-Y <value>     force graph to be that big
%fakemin-X <value>     force graph to be that small
%fakemin-Y <value>     force graph to be that small


reverse X/Y data sense (and titles). Note this is done after processing any fudging of the input data stream(s) (see -xk, -yk, -logx, etc below).
put data set titles below the graph rather than to the right.
no extra space around the data’s endpoints.
connect the quartile center points.
dotted line grid marks.
no box around whole graph.
make the graph take the whole page.
make the graph take about 1/2 the page.
make the graph be small.
draw each data set in its own graph.
no X/Y/Title labels.
no data set labels.
do not mark each data point with distinct markers (endpoints are still marked).
print values larger than 1000 as value/1000.
multiply X input by 1024 (blech).
multiply Y input by 1024 (blech).
multiply X input by 1024*1024 (blech).
multiply Y input by 1024*1024 (blech).
convert X input into lag base 2 of X input.
convert Y input into lag base 2 of Y input.


Workstation price performance from a Digital ad. Process with

graph -rev workstations | groff -TX75
"%T Workstation Price / Performance, 6/93
"%X SPECINT 92 Performance
"%Y Price in $1000’s
35 5
65 10
78 15
110 70
"Dec AXP line
25 4
25 8
38 16
48 21
52 23
64 27
"Sun SPARC line

Quartile Format

Data points are CBx y1 y2 y3 y4 y5. You get a two lines from the first two y values, a mark at the third, and another line from the last two.

See Also

gtroff(1) , gpic(1) , perl(1) .


This should probably be called pic_graph or something like that.

This isn’t done as much as I would like. It isn’t integrated with the groff preprocessor yet. It doesn’t know about .GS/.GE things. I use it to manually generate a pic file and then include that.

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