mirror of
git://projects.qi-hardware.com/openwrt-packages.git
synced 2024-11-25 23:57:13 +02:00
119 lines
3.1 KiB
Lua
119 lines
3.1 KiB
Lua
--[[ $Id: x17.lua 9526 2009-02-13 22:06:13Z smekal $
|
|
|
|
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 General Library 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()
|