1 | /* ======================================================================== *\
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2 | ! $Name: not supported by cvs2svn $:$Id: MRanForestCalc.cc,v 1.28 2007-08-23 10:25:08 tbretz Exp $
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3 | ! --------------------------------------------------------------------------
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4 | !
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5 | ! *
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6 | ! * This file is part of MARS, the MAGIC Analysis and Reconstruction
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7 | ! * Software. It is distributed to you in the hope that it can be a useful
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8 | ! * and timesaving tool in analysing Data of imaging Cerenkov telescopes.
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9 | ! * It is distributed WITHOUT ANY WARRANTY.
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10 | ! *
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11 | ! * Permission to use, copy, modify and distribute this software and its
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12 | ! * documentation for any purpose is hereby granted without fee,
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13 | ! * provided that the above copyright notice appear in all copies and
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14 | ! * that both that copyright notice and this permission notice appear
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15 | ! * in supporting documentation. It is provided "as is" without express
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16 | ! * or implied warranty.
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17 | ! *
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18 | !
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19 | !
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20 | ! Author(s): Thomas Hengstebeck 2/2005 <mailto:hengsteb@physik.hu-berlin.de>
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21 | ! Author(s): Thomas Bretz 8/2005 <mailto:tbretz@astro.uni-wuerzburg.de>
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22 | !
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23 | ! Copyright: MAGIC Software Development, 2000-2006
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24 | !
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25 | !
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26 | \* ======================================================================== */
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27 |
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28 | /////////////////////////////////////////////////////////////////////////////
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29 | //
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30 | // MRanForestCalc
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31 | //
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32 | //
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33 | ////////////////////////////////////////////////////////////////////////////
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34 | #include "MRanForestCalc.h"
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35 |
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36 | #include <TF1.h>
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37 | #include <TFile.h>
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38 | #include <TGraph.h>
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39 | #include <TVector.h>
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40 |
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41 | #include "MHMatrix.h"
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42 |
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43 | #include "MLog.h"
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44 | #include "MLogManip.h"
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45 |
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46 | #include "MData.h"
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47 | #include "MDataArray.h"
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48 |
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49 | #include "MRanForest.h"
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50 | #include "MParameters.h"
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51 |
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52 | #include "MParList.h"
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53 | #include "MTaskList.h"
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54 | #include "MEvtLoop.h"
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55 | #include "MRanForestGrow.h"
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56 | #include "MFillH.h"
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57 |
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58 | ClassImp(MRanForestCalc);
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59 |
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60 | using namespace std;
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61 |
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62 | const TString MRanForestCalc::gsDefName = "MRanForestCalc";
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63 | const TString MRanForestCalc::gsDefTitle = "RF for energy estimation";
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64 |
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65 | const TString MRanForestCalc::gsNameOutput = "RanForestOut";
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66 |
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67 | MRanForestCalc::MRanForestCalc(const char *name, const char *title)
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68 | : fData(0), fRFOut(0), fTestMatrix(0), fFunc("Function", "x"),
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69 | fNumTrees(-1), fNumTry(-1), fNdSize(-1), fNumObsoleteVariables(1),
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70 | fLastDataColumnHasWeights(kFALSE),
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71 | fNameOutput(gsNameOutput), fDebug(kFALSE), fEstimationMode(kMean)
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72 | {
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73 | fName = name ? name : gsDefName.Data();
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74 | fTitle = title ? title : gsDefTitle.Data();
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75 |
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76 | gROOT->GetListOfFunctions()->Remove(&fFunc);
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77 |
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78 | // FIXME:
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79 | fNumTrees = 100; //100
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80 | fNumTry = 0; //3 0 means: in MRanForest estimated best value will be calculated
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81 | fNdSize = 1; //1
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82 | }
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83 |
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84 | MRanForestCalc::~MRanForestCalc()
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85 | {
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86 | fEForests.Delete();
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87 | }
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88 |
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89 | // --------------------------------------------------------------------------
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90 | //
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91 | // Set a function which is applied to the output of the random forest
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92 | //
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93 | Bool_t MRanForestCalc::SetFunction(const char *func)
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94 | {
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95 | return !fFunc.Compile(func);
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96 | }
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97 |
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98 | // --------------------------------------------------------------------------
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99 | //
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100 | // ver=0: One yes/no-classification forest is trained for each bin.
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101 | // the yes/no classification is done using the grid
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102 | // ver=1: One classification forest is trained. The last column contains a
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103 | // value which is turned into a classifier by rf itself using the grid
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104 | // ver=2: One classification forest is trained. The last column already contains
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105 | // the classifier
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106 | // ver=3: A regression forest is trained. The last column contains the
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107 | // classifier
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108 | //
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109 | Int_t MRanForestCalc::Train(const MHMatrix &matrixtrain, const TArrayD &grid, Int_t ver)
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110 | {
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111 | gLog.Separator("MRanForestCalc - Train");
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112 |
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113 | if (!matrixtrain.GetColumns())
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114 | {
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115 | *fLog << err << "ERROR - MHMatrix does not contain rules... abort." << endl;
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116 | return kFALSE;
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117 | }
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118 |
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119 | const Int_t ncols = matrixtrain.GetM().GetNcols();
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120 | const Int_t nrows = matrixtrain.GetM().GetNrows();
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121 | if (ncols<=0 || nrows <=0)
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122 | {
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123 | *fLog << err << "ERROR - No. of columns or no. of rows of matrixtrain equal 0 ... abort." << endl;
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124 | return kFALSE;
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125 | }
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126 |
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127 | // rules (= combination of image par) to be used for energy estimation
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128 | TFile fileRF(fFileName, "recreate");
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129 | if (!fileRF.IsOpen())
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130 | {
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131 | *fLog << err << "ERROR - File to store RFs could not be opened... abort." << endl;
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132 | return kFALSE;
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133 | }
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134 |
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135 | // The number of columns which have to be removed for the training
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136 | // The last data column may contain weight which also have to be removed
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137 | const Int_t nobs = fNumObsoleteVariables + (fLastDataColumnHasWeights?1:0); // Number of obsolete columns
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138 |
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139 | const MDataArray &dcol = *matrixtrain.GetColumns();
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140 |
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141 | // Make a copy of the rules for accessing the train-data
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142 | MDataArray usedrules;
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143 | for (Int_t i=0; i<ncols; i++)
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144 | if (i<ncols-nobs) // -3 is important!!!
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145 | usedrules.AddEntry(dcol[i].GetRule());
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146 | else
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147 | *fLog << inf << "Skipping " << dcol[i].GetRule() << " for training" << endl;
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148 |
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149 | // In the case of regression store the rule to be regessed in the
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150 | // last entry of your rules
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151 | MDataArray rules(usedrules);
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152 | rules.AddEntry(ver<3?"Classification.fVal":dcol[ncols-1].GetRule().Data());
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153 |
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154 | // prepare train-matrix finally used
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155 | TMatrix mat(matrixtrain.GetM());
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156 |
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157 | // Resize it such that the obsolete columns are removed
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158 | mat.ResizeTo(nrows, ncols-nobs+1);
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159 |
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160 | if (fDebug)
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161 | gLog.SetNullOutput(kTRUE);
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162 |
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163 | // In the case one independant RF is trained for each bin (e.g.
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164 | // energy-bin) train all of them
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165 | const Int_t nbins = ver>0 ? 1 : grid.GetSize()-1;
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166 | for (Int_t ie=0; ie<nbins; ie++)
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167 | {
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168 | // In the case weights should be used initialize the
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169 | // corresponding array
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170 | TArrayF weights(nrows);
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171 | if (fLastDataColumnHasWeights)
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172 | for (Int_t j=0; j<nrows; j++)
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173 | {
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174 | weights[j] = matrixtrain.GetM()(j, ncols-nobs);
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175 | if (j%250==0)
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176 | cout << weights[j] << " ";
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177 | }
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178 |
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179 | // Setup the matrix such that the last comlumn contains
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180 | // the classifier or the regeression target value
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181 | switch (ver)
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182 | {
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183 | case 0: // Replace last column by a classification which is 1 in
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184 | // the case the event belongs to this bin, 0 otherwise
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185 | {
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186 | Int_t irows=0;
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187 | for (Int_t j=0; j<nrows; j++)
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188 | {
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189 | const Double_t value = matrixtrain.GetM()(j,ncols-1);
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190 | const Bool_t inside = value>grid[ie] && value<=grid[ie+1];
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191 |
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192 | mat(j, ncols-nobs) = inside ? 1 : 0;
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193 |
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194 | if (inside)
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195 | irows++;
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196 | }
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197 | if (irows==0)
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198 | *fLog << warn << "WARNING - Skipping";
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199 | else
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200 | *fLog << inf << "Training RF for";
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201 |
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202 | *fLog << " bin " << ie << " (" << grid[ie] << ", " << grid[ie+1] << ") " << irows << "/" << nrows << endl;
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203 |
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204 | if (irows==0)
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205 | continue;
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206 | }
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207 | break;
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208 |
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209 | case 1: // Use last column as classifier or for regression
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210 | case 2:
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211 | case 3:
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212 | for (Int_t j=0; j<nrows; j++)
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213 | mat(j, ncols-nobs) = matrixtrain.GetM()(j,ncols-1);
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214 | break;
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215 | }
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216 |
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217 | MHMatrix matrix(mat, &rules, "MatrixTrain");
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218 |
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219 | MParList plist;
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220 | MTaskList tlist;
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221 | plist.AddToList(&tlist);
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222 | plist.AddToList(&matrix);
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223 |
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224 | MRanForest rf;
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225 | rf.SetNumTrees(fNumTrees);
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226 | rf.SetNumTry(fNumTry);
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227 | rf.SetNdSize(fNdSize);
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228 | rf.SetClassify(ver<3 ? kTRUE : kFALSE);
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229 | if (ver==1)
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230 | rf.SetGrid(grid);
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231 | if (fLastDataColumnHasWeights)
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232 | rf.SetWeights(weights);
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233 |
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234 | plist.AddToList(&rf);
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235 |
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236 | MRanForestGrow rfgrow;
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237 | tlist.AddToList(&rfgrow);
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238 |
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239 | MFillH fillh("MHRanForestGini");
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240 | tlist.AddToList(&fillh);
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241 |
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242 | MEvtLoop evtloop(fTitle);
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243 | evtloop.SetParList(&plist);
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244 | evtloop.SetDisplay(fDisplay);
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245 | evtloop.SetLogStream(fLog);
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246 |
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247 | if (!evtloop.Eventloop())
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248 | return kFALSE;
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249 |
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250 | if (fDebug)
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251 | gLog.SetNullOutput(kFALSE);
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252 |
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253 | if (ver==0)
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254 | {
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255 | // Calculate bin center
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256 | const Double_t E = (TMath::Log10(grid[ie])+TMath::Log10(grid[ie+1]))/2;
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257 |
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258 | // save whole forest
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259 | rf.SetUserVal(E);
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260 | rf.SetName(Form("%.10f", E));
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261 | }
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262 |
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263 | rf.Write();
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264 | }
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265 |
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266 | // save rules
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267 | usedrules.Write("rules");
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268 |
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269 | return kTRUE;
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270 | }
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271 |
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272 | Int_t MRanForestCalc::ReadForests(MParList &plist)
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273 | {
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274 | TFile fileRF(fFileName, "read");
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275 | if (!fileRF.IsOpen())
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276 | {
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277 | *fLog << err << dbginf << "File containing RFs could not be opened... aborting." << endl;
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278 | return kFALSE;
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279 | }
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280 |
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281 | fEForests.Delete();
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282 |
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283 | TIter Next(fileRF.GetListOfKeys());
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284 | TObject *o=0;
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285 | while ((o=Next()))
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286 | {
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287 | MRanForest *forest=0;
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288 | fileRF.GetObject(o->GetName(), forest);
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289 | if (!forest)
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290 | continue;
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291 |
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292 | forest->SetUserVal(atof(o->GetName()));
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293 |
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294 | fEForests.Add(forest);
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295 | }
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296 |
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297 | // Maybe fEForests[0].fRules could be used instead?
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298 | if (fData->Read("rules")<=0)
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299 | {
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300 | *fLog << err << "ERROR - Reading 'rules' from file " << fFileName << endl;
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301 | return kFALSE;
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302 | }
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303 |
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304 | if (fileRF.GetListOfKeys()->FindObject("Function"))
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305 | fFunc.Read("Function");
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306 |
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307 | return kTRUE;
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308 | }
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309 |
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310 | Int_t MRanForestCalc::PreProcess(MParList *plist)
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311 | {
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312 | fRFOut = (MParameterD*)plist->FindCreateObj("MParameterD", fNameOutput);
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313 | if (!fRFOut)
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314 | return kFALSE;
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315 |
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316 | fData = (MDataArray*)plist->FindCreateObj("MDataArray");
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317 | if (!fData)
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318 | return kFALSE;
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319 |
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320 | if (!ReadForests(*plist))
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321 | {
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322 | *fLog << err << "Reading RFs failed... aborting." << endl;
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323 | return kFALSE;
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324 | }
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325 |
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326 | *fLog << inf << "RF read from " << fFileName << endl;
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327 |
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328 | if (fTestMatrix)
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329 | return kTRUE;
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330 |
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331 | fData->Print();
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332 |
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333 | if (!fData->PreProcess(plist))
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334 | {
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335 | *fLog << err << "PreProcessing of the MDataArray failed... aborting." << endl;
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336 | return kFALSE;
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337 | }
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338 |
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339 | return kTRUE;
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340 | }
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341 |
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342 | Double_t MRanForestCalc::Eval() const
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343 | {
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344 | TVector event;
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345 | if (fTestMatrix)
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346 | *fTestMatrix >> event;
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347 | else
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348 | *fData >> event;
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349 |
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350 | // --------------- Single Tree RF -------------------
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351 | if (fEForests.GetEntriesFast()==1)
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352 | {
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353 | MRanForest *rf = static_cast<MRanForest*>(fEForests.UncheckedAt(0));
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354 | return rf->CalcHadroness(event);
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355 | }
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356 |
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357 | // --------------- Multi Tree RF -------------------
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358 | static TF1 f1("f1", "gaus");
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359 |
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360 | Double_t sume = 0;
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361 | Double_t sumh = 0;
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362 | Double_t maxh = 0;
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363 | Double_t maxe = 0;
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364 |
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365 | Double_t max = -1e10;
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366 | Double_t min = 1e10;
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367 |
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368 | TIter Next(&fEForests);
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369 | MRanForest *rf = 0;
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370 |
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371 | TGraph g;
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372 | while ((rf=(MRanForest*)Next()))
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373 | {
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374 | const Double_t h = rf->CalcHadroness(event);
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375 | const Double_t e = rf->GetUserVal();
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376 |
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377 | g.SetPoint(g.GetN(), e, h);
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378 |
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379 | sume += e*h;
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380 | sumh += h;
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381 |
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382 | if (h>maxh)
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383 | {
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384 | maxh = h;
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385 | maxe = e;
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386 | }
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387 | if (e>max)
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388 | max = e;
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389 | if (e<min)
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390 | min = e;
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391 | }
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392 |
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393 | switch (fEstimationMode)
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394 | {
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395 | case kMean:
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396 | return sume/sumh;
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397 | case kMaximum:
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398 | return maxe;
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399 | case kFit:
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400 | f1.SetParameter(0, maxh);
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401 | f1.SetParameter(1, maxe);
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402 | f1.SetParameter(2, 0.125);
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403 | g.Fit(&f1, "Q0N");
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404 | return f1.GetParameter(1);
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405 | }
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406 |
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407 | return 0;
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408 | }
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409 |
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410 | Int_t MRanForestCalc::Process()
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411 | {
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412 | const Double_t val = Eval();
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413 |
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414 | fRFOut->SetVal(fFunc.Eval(val));
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415 | fRFOut->SetReadyToSave();
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416 |
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417 | return kTRUE;
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418 | }
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419 |
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420 | void MRanForestCalc::Print(Option_t *o) const
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421 | {
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422 | *fLog << all;
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423 | *fLog << GetDescriptor() << ":" << endl;
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424 | *fLog << " - Forest ";
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425 | switch (fEForests.GetEntries())
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426 | {
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427 | case 0: *fLog << "not yet initialized." << endl; break;
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428 | case 1: *fLog << "is a single tree forest." << endl; break;
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429 | default: *fLog << "is a multi tree forest." << endl; break;
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430 | }
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431 | /*
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432 | *fLog << " - Trees: " << fNumTrees << endl;
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433 | *fLog << " - Trys: " << fNumTry << endl;
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434 | *fLog << " - Node Size: " << fNdSize << endl;
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435 | *fLog << " - Node Size: " << fNdSize << endl;
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436 | */
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437 | *fLog << " - FileName: " << fFileName << endl;
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438 | *fLog << " - NameOutput: " << fNameOutput << endl;
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439 | }
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440 |
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441 | // --------------------------------------------------------------------------
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442 | //
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443 | //
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444 | Int_t MRanForestCalc::ReadEnv(const TEnv &env, TString prefix, Bool_t print)
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445 | {
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446 | Bool_t rc = kFALSE;
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447 | if (IsEnvDefined(env, prefix, "FileName", print))
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448 | {
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449 | rc = kTRUE;
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450 | SetFileName(GetEnvValue(env, prefix, "FileName", fFileName));
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451 | }
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452 | if (IsEnvDefined(env, prefix, "Debug", print))
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453 | {
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454 | rc = kTRUE;
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455 | SetDebug(GetEnvValue(env, prefix, "Debug", fDebug));
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456 | }
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457 | if (IsEnvDefined(env, prefix, "NameOutput", print))
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458 | {
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459 | rc = kTRUE;
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460 | SetNameOutput(GetEnvValue(env, prefix, "NameOutput", fNameOutput));
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461 | }
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462 | if (IsEnvDefined(env, prefix, "EstimationMode", print))
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463 | {
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464 | TString txt = GetEnvValue(env, prefix, "EstimationMode", "");
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465 | txt = txt.Strip(TString::kBoth);
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466 | txt.ToLower();
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467 | if (txt==(TString)"mean")
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468 | fEstimationMode = kMean;
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469 | if (txt==(TString)"maximum")
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470 | fEstimationMode = kMaximum;
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471 | if (txt==(TString)"fit")
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472 | fEstimationMode = kFit;
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473 | rc = kTRUE;
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474 | }
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475 | return rc;
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476 | }
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