/usr/share/doc/libplplot11/examples/lua/x17.lua is in libplplot-dev 5.9.9-2ubuntu2.
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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 | --[[ $Id: x17.lua 11680 2011-03-27 17:57:51Z airwin $
Plots a simple stripchart with four pens.
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")
--------------------------------------------------------------------------
-- main
--------------------------------------------------------------------------
nsteps = 1000
colline = {}
legline = {}
-- plplot initialization
-- Parse and process command line arguments
pl.parseopts(arg, pl.PL_PARSE_FULL)
-- User sets up plot completely except for window and data
-- Eventually settings in place when strip chart is created will be
-- remembered so that multiple strip charts can be used simultaneously.
-- Specify some reasonable defaults for ymin and ymax
-- The plot will grow automatically if needed (but not shrink)
ymin = -0.1
ymax = 0.1
-- Specify initial tmin and tmax -- this determines length of window.
-- Also specify maximum jump in t
-- This can accomodate adaptive timesteps
tmin = 0
tmax = 10
tjump = 0.3 -- percentage of plot to jump
-- Axes options same as plbox.
-- Only automatic tick generation and label placement allowed
-- Eventually I'll make this fancier
colbox = 1
collab = 3
styline = { 2, 3, 4, 5 } -- line style
colline = { 2, 3, 4, 5 } -- pens color
legline= { "sum", "sin", "sin*noi", "sin+noi" } -- pens legend
xlab = 0 -- legend position
ylab = 0.25
autoy = 1 -- autoscale y
acc = 1 -- don't scrip, accumulate
-- Initialize plplot
pl.init()
pl.adv(0)
pl.vsta()
id1 = pl.stripc("bcnst", "bcnstv",
tmin, tmax, tjump, ymin, ymax,
xlab, ylab,
autoy, acc,
colbox, collab,
colline, styline, legline,
"t", "", "Strip chart demo")
autoy = 0 -- autoscale y
acc = 1 -- accumulate
-- This is to represent a loop over time
-- Let's try a random walk process
y1 = 0
y2 = 0
y3 = 0
y4 = 0
dt = 0.1
for n = 0, nsteps-1 do
for i = 0, 200000 do end
t = n * dt
noise = pl.randd() - 0.5
y1 = y1 + noise
y2 = math.sin(t*math.pi/18)
y3 = y2 * noise
y4 = y2 + noise/3
-- There is no need for all pens to have the same number of
-- points or beeing equally time spaced.
if math.mod(n, 2)~=0 then pl.stripa(id1, 0, t, y1) end
if math.mod(n, 3)~=0 then pl.stripa(id1, 1, t, y2) end
if math.mod(n, 4)~=0 then pl.stripa(id1, 2, t, y3) end
if math.mod(n, 5)~=0 then pl.stripa(id1, 3, t, y4) end
end
-- Destroy strip chart and it's memory
pl.stripd(id1)
pl.plend()
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