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55 lines
1.5 KiB
Lua
55 lines
1.5 KiB
Lua
--[[ $Id: x05.lua 9414 2009-01-29 22:48:54Z airwin $
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Histogram demo.
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Copyright (C) 2008 Werner Smekal
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This file is part of PLplot.
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PLplot is free software you can redistribute it and/or modify
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it under the terms of the GNU General Library Public License as published
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by the Free Software Foundation either version 2 of the License, or
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(at your option) any later version.
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PLplot is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with PLplot if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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--]]
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-- initialise Lua bindings for PLplot examples.
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dofile("plplot_examples.lua")
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--------------------------------------------------------------------------
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-- main
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--
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-- Draws a histogram from sample data.
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--------------------------------------------------------------------------
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NPTS=2047
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data = {}
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-- Parse and process command line arguments
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pl.parseopts(arg, pl.PL_PARSE_FULL);
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-- Initialize plplot
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pl.init()
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-- Fill up data points
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delta = 2.0*math.pi/NPTS
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for i=1, NPTS do
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data[i] = math.sin((i-1)*delta)
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end
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pl.col0(1)
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pl.hist(data, -1.1, 1.1, 44, 0)
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pl.col0(2)
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pl.lab("#frValue", "#frFrequency",
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"#frPLplot Example 5 - Probability function of Oscillator")
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pl.plend()
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