mirror of
git://projects.qi-hardware.com/openwrt-packages.git
synced 2024-11-23 04:30:37 +02:00
55 lines
1.5 KiB
Lua
55 lines
1.5 KiB
Lua
|
--[[ $Id: x05.lua 9414 2009-01-29 22:48:54Z airwin $
|
||
|
|
|
||
|
|
Histogram 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 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
|
||
|
|
--
|
||
|
|
-- Draws a histogram from sample data.
|
||
|
|
--------------------------------------------------------------------------
|
||
|
|
|
||
|
|
NPTS=2047
|
||
|
|
data = {}
|
||
|
|
|
||
|
|
-- Parse and process command line arguments
|
||
|
|
pl.parseopts(arg, pl.PL_PARSE_FULL);
|
||
|
|
|
||
|
|
-- Initialize plplot
|
||
|
|
pl.init()
|
||
|
|
|
||
|
|
-- Fill up data points
|
||
|
|
delta = 2.0*math.pi/NPTS
|
||
|
|
for i=1, NPTS do
|
||
|
|
data[i] = math.sin((i-1)*delta)
|
||
|
|
end
|
||
|
|
|
||
|
|
pl.col0(1)
|
||
|
|
pl.hist(data, -1.1, 1.1, 44, 0)
|
||
|
|
pl.col0(2)
|
||
|
|
pl.lab("#frValue", "#frFrequency",
|
||
|
|
"#frPLplot Example 5 - Probability function of Oscillator")
|
||
|
|
|
||
|
|
pl.plend()
|