/usr/share/doc/libplplot12/examples/c++/x05.cc is in libplplot-dev 5.10.0+dfsg2-0.1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// $Id: x05.cc 12176 2012-02-24 20:33:39Z andrewross $
//--------------------------------------------------------------------------
//
//--------------------------------------------------------------------------
// Copyright (C) 2004 Andrew Ross
// Copyright (C) 2004 Alan W. Irwin
//
// 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; version 2 of the License.
//
// 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
//--------------------------------------------------------------------------
//
//--------------------------------------------------------------------------
// Implementation of PLplot example 5 in C++.
//--------------------------------------------------------------------------
#include "plc++demos.h"
#ifdef PL_USE_NAMESPACE
using namespace std;
#endif
class x05 {
public:
x05( int, const char ** );
private:
// Class data
plstream *pls;
static const int NPTS;
};
const int x05::NPTS = 2047;
x05::x05( int argc, const char ** argv )
{
int i;
PLFLT *data = new PLFLT[NPTS];
PLFLT delta;
// plplot initialization
pls = new plstream();
// Parse and process command line arguments.
pls->parseopts( &argc, argv, PL_PARSE_FULL );
// Initialize PLplot.
pls->init();
// Fill up data points.
delta = 2.0 * M_PI / (PLFLT) NPTS;
for ( i = 0; i < NPTS; i++ )
data[i] = sin( i * delta );
pls->col0( 1 );
pls->hist( NPTS, data, -1.1, 1.1, 44, 0 );
pls->col0( 2 );
pls->lab( "#frValue", "#frFrequency",
"#frPLplot Example 5 - Probability function of Oscillator" );
//pls.plend();
delete[] data;
delete pls;
}
int main( int argc, const char ** argv )
{
x05 *x = new x05( argc, argv );
delete x;
}
//--------------------------------------------------------------------------
// End of x05.cc
//--------------------------------------------------------------------------
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