Coding conventions, removing compilation warnings, consistent usage of const
[u/mrichter/AliRoot.git] / STAT / TKDPDF.cxx
CommitLineData
a3408ed3 1#include "TKDPDF.h"
2#include "TKDNodeInfo.h"
3
4#include "TClonesArray.h"
5#include "TTree.h"
6#include "TH2.h"
7#include "TObjArray.h"
8#include "TObjString.h"
9#include "TBox.h"
10#include "TGraph.h"
11#include "TMarker.h"
12
13ClassImp(TKDPDF)
14
15
16
17//_________________________________________________________________
18TKDPDF::TKDPDF() :
19 TKDTreeIF()
20 ,TKDInterpolatorBase()
21{
22// Default constructor. To be used with care since in this case building
23// of data structure is completly left to the user responsability.
24}
25
26//_________________________________________________________________
27TKDPDF::TKDPDF(Int_t npoints, Int_t ndim, UInt_t bsize, Float_t **data) :
28 TKDTreeIF(npoints, ndim, bsize, data)
29 ,TKDInterpolatorBase(ndim)
30{
31// Wrapper constructor for the TKDTree.
32
33 Build();
34}
35
36
37//_________________________________________________________________
38TKDPDF::TKDPDF(TTree *t, const Char_t *var, const Char_t *cut, UInt_t bsize, Long64_t nentries, Long64_t firstentry) :
39 TKDTreeIF()
40 ,TKDInterpolatorBase()
41{
42// Alocate data from a tree. The variables which have to be analysed are
43// defined in the "var" parameter as a colon separated list. The format should
44// be identical to that used by TTree::Draw().
45//
46//
47
48 TObjArray *vars = TString(var).Tokenize(":");
49 fNDim = vars->GetEntriesFast(); fNDimm = 2*fNDim;
50 fNSize = fNDim;
51 if(fNDim > 6/*kDimMax*/) Warning("TKDPDF(TTree*, const Char_t, const Char_t, UInt_t)", Form("Variable number exceed maximum dimension %d. Results are unpredictable.", 6/*kDimMax*/));
52 fBucketSize = bsize;
53
54 Int_t np;
55 Double_t *v;
56 for(int idim=0; idim<fNDim; idim++){
57 if(!(np = t->Draw(((TObjString*)(*vars)[idim])->GetName(), cut, "goff", nentries, firstentry))){
58 Warning("TKDPDF(TTree*, const Char_t, const Char_t, UInt_t)", Form("Can not access data for keys %s. Key defined on tree :", ((TObjString*)(*vars)[idim])->GetName() ));
59 TIterator *it = (t->GetListOfLeaves())->MakeIterator();
60 TObject *o;
61 while((o = (*it)())) printf("\t%s\n", o->GetName());
62 continue;
63 }
64 if(!fNpoints){
65 fNpoints = np;
66 //Info("TKDPDF(TTree*, const Char_t, const Char_t, UInt_t)", Form("Allocating %d data points in %d dimensions.", fNpoints, fNDim));
67 fData = new Float_t*[fNDim];
68 for(int idim=0; idim<fNDim; idim++) fData[idim] = new Float_t[fNpoints];
69 kDataOwner = kTRUE;
70 }
71 v = t->GetV1();
72 for(int ip=0; ip<fNpoints; ip++) fData[idim][ip] = (Float_t)v[ip];
73 }
74 TKDTreeIF::Build();
75 Build();
76}
77
78//_________________________________________________________________
79TKDPDF::~TKDPDF()
80{
81}
82
83//_________________________________________________________________
1a439134 84void TKDPDF::Build(Int_t)
a3408ed3 85{
86// Fill interpolator's data array i.e.
87// - estimation points
88// - corresponding PDF values
89
90 fNTNodes = fNpoints/fBucketSize + ((fNpoints%fBucketSize)?1:0);/*TKDTreeIF::GetNTNodes();*/
91 if(!fBoundaries) MakeBoundaries();
92 fLambda = 1 + fNDim + (fNDim*(fNDim+1)>>1);
93 //printf("after MakeBoundaries() %d\n", memory());
94
95 // allocate interpolation nodes
96 TKDInterpolatorBase::Build(fNTNodes);
97
98 TKDNodeInfo *node = 0x0;
99 Float_t *bounds = 0x0;
100 Int_t *indexPoints;
101 for(int inode=0, tnode = fNnodes; inode<fNTNodes-1; inode++, tnode++){
102 node = (TKDNodeInfo*)(*fTNodes)[inode];
1a439134 103 node->Val()[0] = Float_t(fBucketSize)/fNpoints;
a3408ed3 104 bounds = GetBoundary(tnode);
1a439134 105 for(int idim=0; idim<fNDim; idim++) node->Val()[0] /= (bounds[2*idim+1] - bounds[2*idim]);
106 node->Val()[1] = node->Val()[0]/TMath::Sqrt(float(fBucketSize));
a3408ed3 107
108 indexPoints = GetPointsIndexes(tnode);
109 // loop points in this terminal node
110 for(int idim=0; idim<fNDim; idim++){
1a439134 111 node->Data()[idim] = 0.;
112 for(int ip = 0; ip<fBucketSize; ip++) node->Data()[idim] += fData[idim][indexPoints[ip]];
113 node->Data()[idim] /= fBucketSize;
a3408ed3 114 }
1a439134 115 memcpy(&(node->Data()[fNDim]), bounds, fNDimm*sizeof(Float_t));
a3408ed3 116 }
117
118 // analyze last (incomplete) terminal node
119 Int_t counts = fNpoints%fBucketSize;
120 counts = counts ? counts : fBucketSize;
121 Int_t inode = fNTNodes - 1, tnode = inode + fNnodes;
122 node = (TKDNodeInfo*)(*fTNodes)[inode];
1a439134 123 node->Val()[0] = Float_t(counts)/fNpoints;
a3408ed3 124 bounds = GetBoundary(tnode);
1a439134 125 for(int idim=0; idim<fNDim; idim++) node->Val()[0] /= (bounds[2*idim+1] - bounds[2*idim]);
126 node->Val()[1] = node->Val()[0]/TMath::Sqrt(float(counts));
a3408ed3 127
128 // loop points in this terminal node
129 indexPoints = GetPointsIndexes(tnode);
130 for(int idim=0; idim<fNDim; idim++){
1a439134 131 node->Data()[idim] = 0.;
132 for(int ip = 0; ip<counts; ip++) node->Data()[idim] += fData[idim][indexPoints[ip]];
133 node->Data()[idim] /= counts;
a3408ed3 134 }
1a439134 135 memcpy(&(node->Data()[fNDim]), bounds, fNDimm*sizeof(Float_t));
a3408ed3 136
137 delete [] fBoundaries;
138 fBoundaries = 0x0;
139}
140
141
142//_________________________________________________________________
143void TKDPDF::DrawNode(Int_t tnode, UInt_t ax1, UInt_t ax2)
144{
145// Draw node "node" and the data points within.
146//
147// Observation:
148// This function creates some graphical objects
149// but don't delete it. Abusing this function may cause memory leaks !
150
151 if(tnode < 0 || tnode >= fNTNodes){
152 Warning("DrawNode()", Form("Terminal node %d outside defined range.", tnode));
153 return;
154 }
155
156 Int_t inode = tnode;
157 tnode += fNnodes;
158 // select zone of interest in the indexes array
159 Int_t *index = GetPointsIndexes(tnode);
160 Int_t nPoints = (tnode == 2*fNnodes) ? fNpoints%fBucketSize : fBucketSize;
161
162 // draw data points
163 TGraph *g = new TGraph(nPoints);
164 g->SetMarkerStyle(7);
165 for(int ip = 0; ip<nPoints; ip++) g->SetPoint(ip, fData[ax1][index[ip]], fData[ax2][index[ip]]);
166
167 // draw estimation point
168 TKDNodeInfo *node = (TKDNodeInfo*)(*fTNodes)[inode];
1a439134 169 TMarker *m=new TMarker(node->Data()[ax1], node->Data()[ax2], 20);
a3408ed3 170 m->SetMarkerColor(2);
171 m->SetMarkerSize(1.7);
172
173 // draw node contour
174 Float_t *bounds = GetBoundary(tnode);
175 TBox *n = new TBox(bounds[2*ax1], bounds[2*ax2], bounds[2*ax1+1], bounds[2*ax2+1]);
176 n->SetFillStyle(0);
177
178 g->Draw("ap");
179 m->Draw();
180 n->Draw();
181
182 return;
183}
184