ProcCategory.cc

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// -*- C++ -*-
//
// Package:     MVAComputer
// Class  :     ProcCategory
// 

// Implementation:
//     Categorizes the input variables given a set of ranges for each
//     input variable. Output is an integer number.
//
// Author:      Christophe Saout
// Created:     Sun Sep 16 04:05 CEST 2007
// $Id: ProcCategory.cc,v 1.3 2007/10/21 14:49:46 saout Exp $
//

#include <algorithm>
#include <vector>

#include "PhysicsTools/MVAComputer/interface/VarProcessor.h"
#include "PhysicsTools/MVAComputer/interface/Calibration.h"

using namespace PhysicsTools;

namespace { // anonymous

class ProcCategory : public VarProcessor {
    public:
    typedef VarProcessor::Registry::Registry<ProcCategory,
                    Calibration::ProcCategory> Registry;

    ProcCategory(const char *name,
                 const Calibration::ProcCategory *calib,
                 const MVAComputer *computer);
    virtual ~ProcCategory() {}

    virtual void configure(ConfIterator iter, unsigned int n);
    virtual void eval(ValueIterator iter, unsigned int n) const;

    private:
    typedef Calibration::ProcCategory::BinLimits BinLimits;

    const Calibration::ProcCategory *calib;
};

static ProcCategory::Registry registry("ProcCategory");

ProcCategory::ProcCategory(const char *name,
                           const Calibration::ProcCategory *calib,
                           const MVAComputer *computer) :
    VarProcessor(name, calib, computer), calib(calib)
{
}

void ProcCategory::configure(ConfIterator iter, unsigned int n)
{
    if (n != calib->variableBinLimits.size())
        return;

    unsigned int categories = 1;
    for(std::vector<BinLimits>::const_iterator bin =
                    calib->variableBinLimits.begin();
        bin != calib->variableBinLimits.end(); bin++)
        categories *= (bin->size() + 1);

    if (calib->categoryMapping.size() != categories)
        return;

    while(iter)
        iter++(Variable::FLAG_NONE);

    iter << Variable::FLAG_NONE;
}

void ProcCategory::eval(ValueIterator iter, unsigned int n) const
{
    unsigned int category = 0;
    for(std::vector<BinLimits>::const_iterator vars =
                    calib->variableBinLimits.begin();
        vars != calib->variableBinLimits.end(); vars++, ++iter) {
        unsigned int idx = std::upper_bound(vars->begin(), vars->end(),
                                            *iter) - vars->begin();
        category *= vars->size() + 1;
        category += idx;
    }

    iter(calib->categoryMapping[category]);
}

} // anonymous namespace