Distribution.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2011-2016 OpenFOAM Foundation
-------------------------------------------------------------------------------
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/>.
 
Class
    Foam::Distribution
 
Description
    Accumulating histogram of component values.
    Specified bin resolution, automatic generation of bins.
 
SourceFiles
    DistributionI.H
    Distribution.C
    DistributionIO.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Distribution_H
#define Distribution_H
 
#include "List.H"
#include "Pair.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
template<class Type>
class Distribution;
 
template<class Type>
Istream& operator>>(Istream&, Distribution<Type>&);
 
template<class Type>
Ostream& operator<<(Ostream&, const Distribution<Type>&);
 
/*---------------------------------------------------------------------------*\
                         Class Distribution Declaration
\*---------------------------------------------------------------------------*/
 
template<class Type>
class Distribution
:
    public List<List<scalar>>
{
    // Private data
 
        //- Width of the bin for each component
        Type binWidth_;
 
        //- The start bin index of each component
        List<label> listStarts_;
 
 
public:
 
    //- Component type
    typedef typename pTraits<Type>::cmptType cmptType;
 
 
    // Constructors
 
        //- Construct null
        Distribution();
 
        //- Construct from separate binWidth for each component
        Distribution(const Type& binWidth);
 
        //- Construct as copy
        Distribution(const Distribution& d);
 
 
    //- Destructor
        ~Distribution();
 
    // Member Functions
 
        //- Sum the total weight added to the component in the
        //  argument
        scalar totalWeight(direction cmpt) const;
 
        List<label> keys(direction cmpt) const;
 
        //- Return the appropriate List index for the given bin index.
        //  Resizes the List if required
        label index(direction cmpt, label n);
 
        //- Returns the indices of the first and last non-zero entries
        Pair<label> validLimits(direction cmpt) const;
 
        Type mean() const;
 
        // From http://mathworld.wolfram.com/StatisticalMedian.html
        // The statistical median is the value of the Distribution
        // variable where the cumulative Distribution = 0.5.
        Type median() const;
 
        //- Add a value to the distribution, optionally specifying a weight
        void add
        (
            const Type& valueToAdd,
            const Type& weight = pTraits<Type>::one
        );
 
        //- Return the normalised distribution (probability density)
        //  and bins
        List<List<Pair<scalar>>> normalised() const;
 
        //- Return the distribution of the total bin weights
        List<List < Pair<scalar>>> raw() const;
 
        //- Return the cumulative normalised distribution and
        //  integration locations (at end of bins)
        List<List<Pair<scalar>>> cumulativeNormalised() const;
 
        //- Return the cumulative total bin weights and integration
        //  locations (at end of bins)
        List<List<Pair<scalar>>> cumulativeRaw() const;
 
        //- Resets the Distribution by clearing the stored lists.
        //  Leaves the same number of them and the same binWidth.
        void clear();
 
 
    // Access
 
        //- Return the bin width
        inline const Type& binWidth() const;
 
        //- Return the List start bin indices
        inline const List<label>& listStarts() const;
 
    // Write
 
        //- Write the distribution to file: key normalised raw.
        //  Produces a separate file for each component.
        void write(const fileName& filePrefix) const;
 
 
    // Member Operators
 
        void operator=(const Distribution<Type>&);
 
    // IOstream Operators
 
        friend Istream& operator>> <Type>
        (
            Istream&,
            Distribution<Type>&
        );
 
        friend Ostream& operator<< <Type>
        (
            Ostream&,
            const Distribution<Type>&
        );
};
 
 
// * * * * * * * * * * * * * * * Global Operators  * * * * * * * * * * * * * //
 
template<class Type>
Distribution<Type> operator+
(
    const Distribution<Type>&,
    const Distribution<Type>&
);
 
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "DistributionI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "Distribution.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //