/usr/share/doc/libplplot12/examples/lua/x13.lua is in libplplot-dev 5.10.0+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 | --[[ $Id: x13.lua 12167 2012-02-16 20:24:20Z airwin $
Pie chart demo.
Copyright (C) 2008 Werner Smekal
This file is part of PLplot.
PLplot is free software you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published
by the Free Software Foundation either version 2 of the License, or
(at your option) any later version.
PLplot is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with PLplot if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
--]]
-- initialise Lua bindings for PLplot examples.
dofile("plplot_examples.lua")
text = { "Maurice", "Geoffrey", "Alan",
"Rafael", "Vince" }
--------------------------------------------------------------------------
-- main
--
-- Does a simple pie chart.
--------------------------------------------------------------------------
per = { 10, 32, 12, 30, 16 }
-- Parse and process command line arguments
pl.parseopts(arg, pl.PL_PARSE_FULL);
-- Initialize plplot
pl.init()
pl.adv(0)
-- Ensure window has aspect ratio of one so circle is
-- plotted as a circle.
pl.vasp(1)
pl.wind(0, 10, 0, 10)
pl.col0(2)
-- n.b. all theta quantities scaled by 2*M_PI/500 to be integers to avoid
--floating point logic problems.
theta0 = 0
dthet = 1
for i = 1, 5 do
x = { 5 }
y = { 5 }
j = 2
-- n.b. the theta quantities multiplied by 2*math.pi/500 afterward so
-- in fact per is interpreted as a percentage.
theta1 = theta0 + 5 * per[i]
if i == 5 then theta1 = 500 end
for theta = theta0, theta1, dthet do
x[j] = 5 + 3 * math.cos(2*math.pi/500*theta)
y[j] = 5 + 3 * math.sin(2*math.pi/500*theta)
j = j + 1
thetasave=theta
end
pl.col0(i)
pl.psty(((i + 2) % 8) + 1)
pl.fill(x, y)
pl.col0(1)
pl.line(x, y)
just = 2*math.pi/500*(theta0 + theta1)/2
dx = 0.25 * math.cos(just)
dy = 0.25 * math.sin(just)
if (theta0 + theta1)<250 or (theta0 + theta1)>750 then
just = 0
else
just = 1
end
pl.ptex((x[(j-1)/2+1] + dx), (y[(j-1)/2+1] + dy), 1, 0, just, text[i]);
theta0 = thetasave
end
pl.font(2)
pl.schr(0, 1.3)
pl.ptex(5, 9, 1, 0, 0.5, "Percentage of Sales")
pl.plend()
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