Histogram.cc

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//******************************************************************************
// This file is part of AmpTools, a package for performing Amplitude Analysis
// 
// Copyright Trustees of Indiana University 2010, all rights reserved
// 
// This software written by Matthew Shepherd, Ryan Mitchell, and 
//                  Hrayr Matevosyan at Indiana University, Bloomington
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice and author attribution, this list of conditions and the
//    following disclaimer. 
// 2. Redistributions in binary form must reproduce the above copyright
//    notice and author attribution, this list of conditions and the
//    following disclaimer in the documentation and/or other materials
//    provided with the distribution.
// 3. Neither the name of the University nor the names of its contributors
//    may be used to endorse or promote products derived from this software
//    without specific prior written permission.
// 
// Creation of derivative forms of this software for commercial
// utilization may be subject to restriction; written permission may be
// obtained from the Trustees of Indiana University.
// 
// INDIANA UNIVERSITY AND THE AUTHORS MAKE NO REPRESENTATIONS OR WARRANTIES, 
// EXPRESS OR IMPLIED.  By way of example, but not limitation, INDIANA 
// UNIVERSITY MAKES NO REPRESENTATIONS OR WARRANTIES OF MERCANTABILITY OR 
// FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF THIS SOFTWARE OR 
// DOCUMENTATION WILL NOT INFRINGE ANY PATENTS, COPYRIGHTS, TRADEMARKS, 
// OR OTHER RIGHTS.  Neither Indiana University nor the authors shall be 
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// any other party arising from use of the program.
//******************************************************************************

#include <iostream>
#include <math.h>
#include <assert.h>

#include "IUAmpTools/Histogram.h"

using namespace std;

Histogram::Histogram( string name, string title ) :
m_nBins( 0 ),
m_xLow( 0 ),
m_xHigh( 0 ),
m_entries( 0 ),
m_binContents( 0 ),
m_name( name ),
m_title( title ){}


void
Histogram::clear( void ){
  
  m_binContents = vector< double >( m_nBins );
  m_entries = 0;
}

void
Histogram::normalize( double integral ){
  
  double scaleFactor = integral / m_entries;
  
  for( int i = 0; i < m_nBins; ++i ){
    
    m_binContents[i] *= scaleFactor;
  }
  
  m_entries *= scaleFactor;
}

void
Histogram::operator+=( HistStruct& hStruct ){
  
  assert( m_nBins <= MAXBINS );
  
  for( int i = 0; i < m_nBins; ++i ){
    
    m_binContents[i] += hStruct.contents[i];
  }
  
  m_entries += hStruct.entries;
}