1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright (C) 1991-2009 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 the
13 Free Software Foundation; either version 2 of the License, or (at your
14 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, write to the Free Software Foundation,
23 Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25 \*---------------------------------------------------------------------------*/
28 #include "addToRunTimeSelectionTable.H"
30 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
34 defineTypeNameAndDebug(normal, 0);
35 addToRunTimeSelectionTable(pdf, normal, dictionary);
38 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
40 Foam::normal::normal(const dictionary& dict, Random& rndGen)
43 pdfDict_(dict.subDict(typeName + "PDF")),
44 minValue_(readScalar(pdfDict_.lookup("minValue"))),
45 maxValue_(readScalar(pdfDict_.lookup("maxValue"))),
46 expectation_(pdfDict_.lookup("expectation")),
47 variance_(pdfDict_.lookup("variance")),
48 strength_(pdfDict_.lookup("strength")),
49 range_(maxValue_-minValue_)
52 label n = strength_.size();
53 for (label i=0; i<n; i++)
55 scalar x = expectation_[i];
56 scalar s = strength_[i];
57 for (label j=0; j<n; j++)
61 scalar x2 = (x-expectation_[j])/variance_[j];
62 scalar y = exp(-0.5*x2*x2);
70 for (label i=0; i<n; i++)
77 // * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
79 Foam::normal::~normal()
83 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
85 Foam::scalar Foam::normal::sample() const
89 label n = expectation_.size();
94 x = minValue_ + range_*rndGen_.scalar01();
95 y = rndGen_.scalar01();
98 for (label i=0; i<n; i++)
100 scalar nu = expectation_[i];
101 scalar sigma = variance_[i];
102 scalar s = strength_[i];
103 scalar v = (x-nu)/sigma;
104 p += s*exp(-0.5*v*v);
117 Foam::scalar Foam::normal::minValue() const
123 Foam::scalar Foam::normal::maxValue() const
129 // ************************************************************************* //