1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
7 -------------------------------------------------------------------------------
9 This file is part of OpenFOAM.
11 OpenFOAM is free software: you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published by
13 the Free Software Foundation, either version 3 of the License, or
14 (at your option) any later version.
16 OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 You should have received a copy of the GNU General Public License
22 along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
28 Test program for making graphs
30 \*---------------------------------------------------------------------------*/
34 #include "mathematicalConstants.H"
38 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
43 scalarField r(x.size());
50 scalarField b = 0.5*(1.0 + erf(x));
51 scalarField c = 1.0 - b;
52 scalarField gradb = (1/::sqrt(mathematicalConstant::pi))*exp(-sqr(x));
53 scalarField lapb = -2*x*gradb;
55 r = lapb*b*c/(gradb*gradb);
58 graph("r", "x", "r", x, r).write("r", "xmgr");
66 // ************************************************************************* //