Histo1DActions/Histo1DAction/Histo1DAction.h

/*
 * Histo1DAction.h
 *
 *  Created on: 25/ago/2009
 *      Author: Nicola Mori
 */

/*! @file Histo1DAction.h The Histo1DAction class declaration file. */

#ifndef HISTO1DACTION_H_
#define HISTO1DACTION_H_

#include "../../CollectionAction/CollectionAction.h"

#include <TH1I.h>
#include <TH1F.h>
#include <TH1D.h>

/*! @brief An abstract action that fills a 1-dimensional histogram.
 *
 * This abstract class provides all the common methods needed to produce 1-dimensional histograms,
 * like reading the bins from a file, setting up the root histogram and so on. It handles histograms
 * both as a ROOT histogram and as a vector. The OnGood() method has to be implemented in children
 * classes, with the specific physical variable to fill the histogram. Eg., a rigidity histogram class
 * derived from Histo1DAction could have this OnGood() implementation:
 *
 * Fill(event->GetTrack(0)->GetTrkTrack()->GetRigidity());
 *
 * Fill() automatically fills the ROOT and the vector histogram.
 * The template argument HistoType is the type of histogram (Int_t, Double_t,...). In current
 * implementation, ROOT histograms are only supported for Int_t, Float_t and Double_t. For all the
 * other types, only the the vector histogram with text file output will be produced. If you want to
 * implement some new types of ROOT histograms, please specialize the template definitions of _CreateHisto()
 * and ~Histo1DAction() (see the specializations in the .cpp file).
 *
 * */
template<class HistoType>
class Histo1DAction: public CollectionAction {
public:

  /*! @brief Constructor.
   *
   * Binning is read from a text file.
   *
   * @param actionName The action's name.
   * @param title The ROOT histogram title.
   * @param outFileBase The file base name for the histogram output. If "", no output file will be produced.
   * @param mode The mode of ROOT file creation (see documentation of TFile constructor
   *             in ROOT's reference guide).
   * @param outRoot If true, an output ROOT file named outFileBase + ".root" will be produced.
   * @param outText If true, an output text file named outFileBase + ".txt" will be produced. It will overwrite an
   *                eventually existing file with the same name.
   */
  Histo1DAction(const char *actionName, TString title, TString outFileBase = "", TString mode = "UPDATE", bool outRoot =
      false, bool outText = false);

  /*! @brief Destructor
   *
   * This has to be specialized for each kind of ROOT histogram.
   *
   * */
  ~Histo1DAction();

  /*! @brief Sets the X axis using a binning read from a a vector.
   *
   * @param label The axis' label.
   * @param bins A vector containing the histogram binning (with sign, eventually; from lowest to highest).
   */
  void SetXAxis(TString label, vector<float> &bins);
  /*! @brief Sets the X axis reading the binning from a file.
   *
   * @param label The axis' label.
   * @param binsFile The file containing the bins (with sign, eventually; from lowest to highest).
   */
  void SetXAxis(TString label, TString binsFile);
  /*! @brief Sets the X axis specifying the binning parameters.
   *
   * @param label The axis' label.
   * @param nBins The number of bins.
   * @param min The lower limit of the axis.
   * @param max The upper limit of the axis.
   * @param logBinning If true, bins will be logarithmically spaced.
   */
  void SetXAxis(TString label, unsigned int nBins, float min, float max, bool logBinning = false);

  /*! @brief Sets up the histogram
   *
   * This routine effectively prepares the histogram, after the desired parameters has been set by #SetXAxis().
   *
   * @param events Pointer to PamLevel2 events (unused).
   */
  void Setup(PamLevel2 *events) {
    CollectionAction::Setup(events);
    _InitHistos();

  }
  /*! @ brief Post-analysis tasks.
   *
   * This method writes the output on a ROOT file if the proper option was set in the constructor.
   */
  void Finalize();

  /*! @brief Returns the histogram.
   *
   * @return A reference to a vector containing the values of the bins of the histogram.
   */
  vector<HistoType> &GetHisto() {
    return _histo;
  }

  /*! Fills the ROOT and the vector histogram.
   *
   * @param value The value of the X coordinate associated to the event.
   * @param weight The weight which will be applied to the event.
   */
  void Fill(double value, double weight = 1.);

  /*! @brief The number of events which fell below the lower histogram limit. */
  HistoType GetOverflow() {
    return _overflow;
  }

  /*! @brief The number of events which fell above the upper histogram limit. */
  HistoType GetUnderflow() {
    return _underflow;
  }

protected:

  /*! @brief The vector containing the limits of the bins(from lower to higher). */
  std::vector<float> _bins;
  /*! @brief A vector containing the value of the histogram for each bin. */
  vector<HistoType> _histo;
  /*! @brief The ROOT histogram. */
  TH1 *_rootHisto;

private:

  unsigned int _underflow, _overflow;

  TString _outFileBase;
  TString _mode;
  TString _title, _xLabel;
  bool _outRoot;
  bool _outText;

  void _CreateHisto();
  void _InitHistos();
};

template<class HistoType>
void Histo1DAction<HistoType>::_CreateHisto() {

  // No ROOT histogram for generic type; see template specializations in .cpp file.
  _rootHisto = NULL;
}
// Specializations for _CreateHistos(). See Histo1DAction.cpp
template<>
void Histo1DAction<Int_t>::_CreateHisto();

template<>
void Histo1DAction<Float_t>::_CreateHisto();

template<>
void Histo1DAction<Double_t>::_CreateHisto();

template<class HistoType>
void Histo1DAction<HistoType>::_InitHistos() {

  _CreateHisto();
  if (_bins.size() < 2) // SetXAxis not called by the main program, or wrongly filled (only 1 bin limit)
    SetXAxis("Default X", 10, 0., 1.);

  if (_rootHisto) {
    Double_t *auxArray = new Double_t[_bins.size()];

    for (unsigned int i = 0; i < _bins.size(); i++) {
      auxArray[i] = _bins[i];
    }

    _rootHisto->SetBins(_bins.size() - 1, auxArray);
    _rootHisto->SetName(GetName());
    _rootHisto->SetTitle(_title);
    _rootHisto->SetXTitle(_xLabel);
    _rootHisto->SetYTitle("Events");

    delete[] auxArray;

  }

  _histo.resize(_bins.size() - 1);

}

template<class HistoType>
Histo1DAction<HistoType>::~Histo1DAction() {

  delete _rootHisto;
  _rootHisto = NULL;

}

template<class HistoType>
Histo1DAction<HistoType>::Histo1DAction(const char *actionName, TString title, TString outFileBase, TString mode,
    bool outRoot, bool outText) :
  CollectionAction(actionName), _bins(0), _histo(0), _rootHisto(NULL), _outFileBase(outFileBase), _mode(mode), _title(
      title), _xLabel(""), _outRoot(outRoot), _outText(outText) {

}

template<class HistoType>
void Histo1DAction<HistoType>::SetXAxis(TString label, vector<float> &bins) {

  _bins = bins;
  _xLabel = label;

}

template<class HistoType>
void Histo1DAction<HistoType>::SetXAxis(TString label, TString binsFile) {

  // Reading the bins from file
  ifstream binListFile;
  binListFile.open(binsFile);

  TString auxString;
  _bins.resize(0);
  while (!binListFile.eof()) {
    binListFile >> auxString;
    if (auxString != "") {
      _bins.push_back(auxString.Atof());
    }
  }
  binListFile.close();

  _xLabel = label;

}

template<class HistoType>
void Histo1DAction<HistoType>::SetXAxis(TString label, unsigned int nBins, float min, float max, bool logBinning) {

  _bins.resize(nBins + 1);

  if (!logBinning || (logBinning && min <= 0.)) {

#ifdef DEBUGPAMCUT
    if (logbinning && rigMin <= 0.)
    cout << "Warning: logarithmic binning was chosen for X axis but min <= 0. Using linear binning."
#endif

    float step = (max - min) / nBins;
    for (unsigned int i = 0; i < nBins + 1; i++) {
      _bins[i] = min + i * step;
    }

  }
  else {

    double maxExp = log10(max / min);
    for (unsigned int i = 0; i < nBins + 1; i++) {
      _bins[i] = min * pow(10., (double) i / ((double) nBins) * maxExp);
    }

  }

  _xLabel = label;
}

template<class HistoType>
inline void Histo1DAction<HistoType>::Fill(double value, double weight) {

  _rootHisto->Fill(value, weight);

  if (value < _bins[0]) {
    _underflow += (HistoType) weight;
    return;
  }

  if (value > _bins[_bins.size() - 1]) {
    _overflow += (HistoType) weight;
    return;
  }

  int xBin = 1;
  while (value >= _bins[xBin]) {
    xBin++;
  }
  xBin--;

  _histo[xBin] += (HistoType) weight;
}

template<class HistoType>
void Histo1DAction<HistoType>::Finalize() {

  if (_outFileBase != "") {
    // Write the ROOT file
    if (_rootHisto && _outRoot) {
      TFile outRootFile((_outFileBase + ".root"), _mode);
      outRootFile.cd();
      _rootHisto->Write();
      outRootFile.Close();
    }

    //Write the text file
    if (_outText) {
      ofstream outTextFile((_outFileBase + ".txt").Data(), ios_base::out);
      for (unsigned int i = 0; i < _histo.size(); i++) {
        outTextFile << _histo[i] << "\n";
      }
      outTextFile << endl;
      outTextFile.close();
    }
  }

}
#endif /* HISTO1DACTION_H_ */
1	/*
2	* Histo1DAction.h
3	*
4	* Created on: 25/ago/2009
5	* Author: Nicola Mori
6	*/
7
8	/! @file Histo1DAction.h The Histo1DAction class declaration file. /
9
10	#ifndef HISTO1DACTION_H_
11	#define HISTO1DACTION_H_
12
13	#include "../../CollectionAction/CollectionAction.h"
14
15	#include <TH1I.h>
16	#include <TH1F.h>
17	#include <TH1D.h>
18
19	/*! @brief An abstract action that fills a 1-dimensional histogram.
20	*
21	* This abstract class provides all the common methods needed to produce 1-dimensional histograms,
22	* like reading the bins from a file, setting up the root histogram and so on. It handles histograms
23	* both as a ROOT histogram and as a vector. The OnGood() method has to be implemented in children
24	* classes, with the specific physical variable to fill the histogram. Eg., a rigidity histogram class
25	* derived from Histo1DAction could have this OnGood() implementation:
26	*
27	* Fill(event->GetTrack(0)->GetTrkTrack()->GetRigidity());
28	*
29	* Fill() automatically fills the ROOT and the vector histogram.
30	* The template argument HistoType is the type of histogram (Int_t, Double_t,...). In current
31	* implementation, ROOT histograms are only supported for Int_t, Float_t and Double_t. For all the
32	* other types, only the the vector histogram with text file output will be produced. If you want to
33	* implement some new types of ROOT histograms, please specialize the template definitions of _CreateHisto()
34	* and ~Histo1DAction() (see the specializations in the .cpp file).
35	*
36	* */
37	template<class HistoType>
38	class Histo1DAction: public CollectionAction {
39	public:
40
41	/*! @brief Constructor.
42	*
43	* Binning is read from a text file.
44	*
45	* @param actionName The action's name.
46	* @param title The ROOT histogram title.
47	* @param outFileBase The file base name for the histogram output. If "", no output file will be produced.
48	* @param mode The mode of ROOT file creation (see documentation of TFile constructor
49	* in ROOT's reference guide).
50	* @param outRoot If true, an output ROOT file named outFileBase + ".root" will be produced.
51	* @param outText If true, an output text file named outFileBase + ".txt" will be produced. It will overwrite an
52	* eventually existing file with the same name.
53	*/
54	Histo1DAction(const char *actionName, TString title, TString outFileBase = "", TString mode = "UPDATE", bool outRoot =
55	false, bool outText = false);
56
57	/*! @brief Destructor
58	*
59	* This has to be specialized for each kind of ROOT histogram.
60	*
61	* */
62	~Histo1DAction();
63
64	/*! @brief Sets the X axis using a binning read from a a vector.
65	*
66	* @param label The axis' label.
67	* @param bins A vector containing the histogram binning (with sign, eventually; from lowest to highest).
68	*/
69	void SetXAxis(TString label, vector<float> &bins);
70	/*! @brief Sets the X axis reading the binning from a file.
71	*
72	* @param label The axis' label.
73	* @param binsFile The file containing the bins (with sign, eventually; from lowest to highest).
74	*/
75	void SetXAxis(TString label, TString binsFile);
76	/*! @brief Sets the X axis specifying the binning parameters.
77	*
78	* @param label The axis' label.
79	* @param nBins The number of bins.
80	* @param min The lower limit of the axis.
81	* @param max The upper limit of the axis.
82	* @param logBinning If true, bins will be logarithmically spaced.
83	*/
84	void SetXAxis(TString label, unsigned int nBins, float min, float max, bool logBinning = false);
85
86	/*! @brief Sets up the histogram
87	*
88	* This routine effectively prepares the histogram, after the desired parameters has been set by #SetXAxis().
89	*
90	* @param events Pointer to PamLevel2 events (unused).
91	*/
92	void Setup(PamLevel2 *events) {
93	CollectionAction::Setup(events);
94	_InitHistos();
95
96	}
97	/*! @ brief Post-analysis tasks.
98	*
99	* This method writes the output on a ROOT file if the proper option was set in the constructor.
100	*/
101	void Finalize();
102
103	/*! @brief Returns the histogram.
104	*
105	* @return A reference to a vector containing the values of the bins of the histogram.
106	*/
107	vector<HistoType> &GetHisto() {
108	return _histo;
109	}
110
111	/*! Fills the ROOT and the vector histogram.
112	*
113	* @param value The value of the X coordinate associated to the event.
114	* @param weight The weight which will be applied to the event.
115	*/
116	void Fill(double value, double weight = 1.);
117
118	/! @brief The number of events which fell below the lower histogram limit. /
119	HistoType GetOverflow() {
120	return _overflow;
121	}
122
123	/! @brief The number of events which fell above the upper histogram limit. /
124	HistoType GetUnderflow() {
125	return _underflow;
126	}
127
128	protected:
129
130	/! @brief The vector containing the limits of the bins(from lower to higher). /
131	std::vector<float> _bins;
132	/! @brief A vector containing the value of the histogram for each bin. /
133	vector<HistoType> _histo;
134	/! @brief The ROOT histogram. /
135	TH1 *_rootHisto;
136
137	private:
138
139	unsigned int _underflow, _overflow;
140
141	TString _outFileBase;
142	TString _mode;
143	TString _title, _xLabel;
144	bool _outRoot;
145	bool _outText;
146
147	void _CreateHisto();
148	void _InitHistos();
149	};
150
151	template<class HistoType>
152	void Histo1DAction<HistoType>::_CreateHisto() {
153
154	// No ROOT histogram for generic type; see template specializations in .cpp file.
155	_rootHisto = NULL;
156	}
157	// Specializations for _CreateHistos(). See Histo1DAction.cpp
158	template<>
159	void Histo1DAction<Int_t>::_CreateHisto();
160
161	template<>
162	void Histo1DAction<Float_t>::_CreateHisto();
163
164	template<>
165	void Histo1DAction<Double_t>::_CreateHisto();
166
167	template<class HistoType>
168	void Histo1DAction<HistoType>::_InitHistos() {
169
170	_CreateHisto();
171	if (_bins.size() < 2) // SetXAxis not called by the main program, or wrongly filled (only 1 bin limit)
172	SetXAxis("Default X", 10, 0., 1.);
173
174	if (_rootHisto) {
175	Double_t *auxArray = new Double_t[_bins.size()];
176
177	for (unsigned int i = 0; i < _bins.size(); i++) {
178	auxArray[i] = _bins[i];
179	}
180
181	_rootHisto->SetBins(_bins.size() - 1, auxArray);
182	_rootHisto->SetName(GetName());
183	_rootHisto->SetTitle(_title);
184	_rootHisto->SetXTitle(_xLabel);
185	_rootHisto->SetYTitle("Events");
186
187	delete[] auxArray;
188
189	}
190
191	_histo.resize(_bins.size() - 1);
192
193	}
194
195	template<class HistoType>
196	Histo1DAction<HistoType>::~Histo1DAction() {
197
198	delete _rootHisto;
199	_rootHisto = NULL;
200
201	}
202
203	template<class HistoType>
204	Histo1DAction<HistoType>::Histo1DAction(const char *actionName, TString title, TString outFileBase, TString mode,
205	bool outRoot, bool outText) :
206	CollectionAction(actionName), _bins(0), _histo(0), _rootHisto(NULL), _outFileBase(outFileBase), _mode(mode), _title(
207	title), _xLabel(""), _outRoot(outRoot), _outText(outText) {
208
209	}
210
211	template<class HistoType>
212	void Histo1DAction<HistoType>::SetXAxis(TString label, vector<float> &bins) {
213
214	_bins = bins;
215	_xLabel = label;
216
217	}
218
219	template<class HistoType>
220	void Histo1DAction<HistoType>::SetXAxis(TString label, TString binsFile) {
221
222	// Reading the bins from file
223	ifstream binListFile;
224	binListFile.open(binsFile);
225
226	TString auxString;
227	_bins.resize(0);
228	while (!binListFile.eof()) {
229	binListFile >> auxString;
230	if (auxString != "") {
231	_bins.push_back(auxString.Atof());
232	}
233	}
234	binListFile.close();
235
236	_xLabel = label;
237
238	}
239
240	template<class HistoType>
241	void Histo1DAction<HistoType>::SetXAxis(TString label, unsigned int nBins, float min, float max, bool logBinning) {
242
243	_bins.resize(nBins + 1);
244
245	if (!logBinning \|\| (logBinning && min <= 0.)) {
246
247	#ifdef DEBUGPAMCUT
248	if (logbinning && rigMin <= 0.)
249	cout << "Warning: logarithmic binning was chosen for X axis but min <= 0. Using linear binning."
250	#endif
251
252	float step = (max - min) / nBins;
253	for (unsigned int i = 0; i < nBins + 1; i++) {
254	_bins[i] = min + i * step;
255	}
256
257	}
258	else {
259
260	double maxExp = log10(max / min);
261	for (unsigned int i = 0; i < nBins + 1; i++) {
262	_bins[i] = min * pow(10., (double) i / ((double) nBins) * maxExp);
263	}
264
265	}
266
267	_xLabel = label;
268	}
269
270	template<class HistoType>
271	inline void Histo1DAction<HistoType>::Fill(double value, double weight) {
272
273	_rootHisto->Fill(value, weight);
274
275	if (value < _bins[0]) {
276	_underflow += (HistoType) weight;
277	return;
278	}
279
280	if (value > _bins[_bins.size() - 1]) {
281	_overflow += (HistoType) weight;
282	return;
283	}
284
285	int xBin = 1;
286	while (value >= _bins[xBin]) {
287	xBin++;
288	}
289	xBin--;
290
291	_histo[xBin] += (HistoType) weight;
292	}
293
294	template<class HistoType>
295	void Histo1DAction<HistoType>::Finalize() {
296
297	if (_outFileBase != "") {
298	// Write the ROOT file
299	if (_rootHisto && _outRoot) {
300	TFile outRootFile((_outFileBase + ".root"), _mode);
301	outRootFile.cd();
302	_rootHisto->Write();
303	outRootFile.Close();
304	}
305
306	//Write the text file
307	if (_outText) {
308	ofstream outTextFile((_outFileBase + ".txt").Data(), ios_base::out);
309	for (unsigned int i = 0; i < _histo.size(); i++) {
310	outTextFile << _histo[i] << "\n";
311	}
312	outTextFile << endl;
313	outTextFile.close();
314	}
315	}
316
317	}
318	#endif /* HISTO1DACTION_H_ */