/usr/share/doc/libplplot12/examples/lua/x11.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 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 | --[[ $Id: x11.lua 12167 2012-02-16 20:24:20Z airwin $
Mesh plot 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")
XPTS = 35 -- Data points in x
YPTS = 46 -- Data points in y
LEVELS = 10
opt = { pl.DRAW_LINEXY, pl.DRAW_LINEXY }
alt = { 33, 17 }
az = { 24, 115 }
title = {
"#frPLplot Example 11 - Alt=33, Az=24, Opt=3",
"#frPLplot Example 11 - Alt=17, Az=115, Opt=3" }
-- bitwise or operator from http://lua-users.org/wiki/BaseSixtyFour
-- (c) 2006-2008 by Alex Kloss
-- licensed under the terms of the LGPL2
-- return single bit (for OR)
function bit(x,b)
return ((x % 2^b) - (x % 2^(b-1)) > 0)
end
-- logic OR for number values
function lor(x,y)
result = 0
for p=1,8 do result = result + (((bit(x,p) or bit(y,p)) == true) and 2^(p-1) or 0) end
return result
end
function cmap1_init()
i = { 0, 1 } -- left boundary , right boundary
h = { 240, 0 } -- blue -> green -> yellow -> red
l = { 0.6, 0.6 }
s = { 0.8, 0.8 }
pl.scmap1n(256)
pl.scmap1l(0, i, h, l, s)
end
----------------------------------------------------------------------------
-- main
--
-- Does a series of mesh plots for a given data set, with different
-- viewing options in each plot.
----------------------------------------------------------------------------
nlevel = LEVELS
clevel = {}
-- Parse and process command line arguments
pl.parseopts(arg, pl.PL_PARSE_FULL)
-- Initialize plplot
pl.init()
x = {}
y = {}
z = {}
for i=1, XPTS do
x[i] = 3 * (i-1-math.floor(XPTS/2)) / math.floor(XPTS/2)
end
for i=1, YPTS do
y[i] = 3 * (i-1-math.floor(YPTS/2)) / math.floor(YPTS/2)
end
for i=1, XPTS do
xx = x[i]
z[i] = {}
for j=1, YPTS do
yy = y[j]
z[i][j] = 3 * (1-xx)^2 * math.exp(-xx^2 - (yy+1.)^2) -
10 * (xx/5 - xx^3 - yy^5) * math.exp(-xx^2-yy^2) -
1/3 * math.exp(-(xx+1)^2 - yy^2)
-- Jungfraujoch/Interlaken
if false then
if z[i][j] < -1 then z[i][j] = -1 end
end
end
end
zmax, zmin = pl.MinMax2dGrid(z)
step = (zmax - zmin)/(nlevel+1)
for i=1, nlevel do
clevel[i] = zmin + step + step*(i-1)
end
cmap1_init()
for k=1, 2 do
for i=1, 4 do
pl.adv(0)
pl.col0(1)
pl.vpor(0, 1, 0, 0.9)
pl.wind(-1, 1, -1, 1.5)
pl.w3d(1, 1, 1.2, -3, 3, -3, 3, zmin, zmax, alt[k], az[k])
pl.box3("bnstu", "x axis", 0, 0,
"bnstu", "y axis", 0, 0,
"bcdmnstuv", "z axis", 0, 4)
pl.col0(2)
-- wireframe plot
if i==1 then
pl.mesh(x, y, z, opt[k])
end
-- magnitude colored wireframe plot
if i==2 then
pl.mesh(x, y, z, lor(opt[k], pl.MAG_COLOR))
end
-- magnitude colored wireframe plot with sides
if i==3 then
pl.plot3d(x, y, z, lor(opt[k], pl.MAG_COLOR), 1)
end
-- magnitude colored wireframe plot with base contour
if i==4 then
pl.meshc(x, y, z, lor(lor(opt[k], pl.MAG_COLOR), pl.BASE_CONT), clevel)
end
pl.col0(3)
pl.mtex("t", 1, 0.5, 0.5, title[k])
end
end
-- Clean up
pl.plend()
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