Test-graphXi.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM 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 General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Application
    graphTest
 
Description
    Test program for making graphs
 
\*---------------------------------------------------------------------------*/
 
#include "graph.H"
#include "OFstream.H"
#include "mathematicalConstants.H"
 
using namespace Foam;
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
int main()
{
    scalarField x(100);
    scalarField r(x.size());
 
    forAll(x, i)
    {
        x[i] = -3 + 0.06*i;
    }
 
    scalarField b(0.5*(1.0 + erf(x)));
    scalarField c(1.0 - b);
    scalarField gradb((1/::sqrt(constant::mathematical::pi))*exp(-sqr(x)));
    scalarField lapb(-2*x*gradb);
 
    r = lapb*b*c/(gradb*gradb);
 
 
    graph("r", "x", "r", x, r).write("r", "xmgr");
 
    Info<< "end" << endl;
 
    return 0;
}
 
 
// ************************************************************************* //