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rootHist.cxx

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//  class rootHist
//  Author:  Theodore Hierath
//  This class contains a basic histogram function
//  The bins are numbered from 0 to number of bins - 1;

#include <iostream>
#include "rootHist.h"

// Specify the number of bins for the histogram
rootHist::rootHist(int bins) : num_bins(bins)
{
    if(bins <= 0)
    {
        std::cerr << "ERROR in constructor for roothist:\n" 
            "   The total number of bins must be greater than zero."
            << std::endl;
        exit(0);
    }
    
    hist = new double[num_bins];
    for (int i = 0; i < num_bins; i++) hist[i] = 0;
}

rootHist::~rootHist(void)
{
    delete [] hist;
    hist = NULL;
}

rootHist::rootHist(const rootHist &oldHist) : num_bins(oldHist.num_bins)
{
    hist = new double[num_bins];
    for (int i = 0; i < num_bins; i++) hist[i] = oldHist.hist[i];
}

// Update a specific bin by replacing its contents
void rootHist::updateBin(int binNumber, double data)
{
    if(binNumber < 0 || binNumber >= num_bins)
    {
        std::cerr << "Error:  bin number is out of range" << std::endl;
        exit(0);
    }
    hist[binNumber] = data;
}

// Retrieve the contents of a bin
double rootHist::retrieveBin(int binNumber)
{
    if(binNumber < 0 || binNumber >= num_bins)
    {
        std::cerr << "Error:  bin number is out of range" << std::endl;
        exit(0);
    }
    return hist[binNumber];
}

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