1 #ifndef __JCOMPAREHISTOGRAMS__JTESTPOISSONLOGLIKELIHOODRATIOBEESTONBARLOW__
2 #define __JCOMPAREHISTOGRAMS__JTESTPOISSONLOGLIKELIHOODRATIOBEESTONBARLOW__
15 #include "RooRealVar.h"
16 #include "RooRealConstant.h"
17 #include "RooParamHistFunc.h"
18 #include "RooHistConstraint.h"
19 #include "RooProdPdf.h"
20 #include "RooDataSet.h"
21 #include "RooDataHist.h"
22 #include "RooHistFunc.h"
23 #include "RooHistPdf.h"
24 #include "RooRealSumPdf.h"
25 #include "RooFitResult.h"
49 JTest_t(
"Poissonian Log-Likelihood Ratio with Beeston-Barlow Correction",
"NLLR")
66 static const double penalty = -1e9;
68 const TH1* h1 =
dynamic_cast<const TH1*
>(o1);
69 const TH1* h2 =
dynamic_cast<const TH1*
>(o2);
71 if (h1 == NULL || h2 == NULL) {
75 if(h1->GetNbinsX() != h2->GetNbinsX() ||
76 h1->GetNbinsY() != h2->GetNbinsY() ||
77 h1->GetNbinsZ() != h2->GetNbinsZ()) {
78 THROW(
JValueOutOfRange,
"JTestPoissonLogLikelihood::test(): Histograms with different binning. The objects: " <<
79 h1->GetName() <<
" and " << h2->GetName() <<
" can not be compared." << endl);
82 RooRealVar
x(
"x",
"x", h1->GetBinLowEdge(1), h1->GetBinLowEdge(h1->GetNbinsX()) + h1->GetBinWidth(h1->GetNbinsX()));
84 RooDataHist dh1(
"dh1", h1->GetTitle(),
x, h1);
85 RooDataHist dh2(
"dh2", h2->GetTitle(),
x, h2);
87 #if ROOT_VERSION_CODE < ROOT_VERSION(6,32,0)
88 RooParamHistFunc ph1(
"ph1",
"ph1", dh1);
90 RooParamHistFunc ph1(
"ph1",
"ph1", dh1,
x);
92 RooHistConstraint hc1(
"hc1",
"hc1", ph1);
94 RooRealSumPdf model_tmp1(
"model_tmp1",
"model_tmp1", ph1, RooRealConstant::value(1.0));
95 RooProdPdf model1 (
"model1",
"model1", hc1, RooFit::Conditional(model_tmp1,
x));
97 RooFitResult* result1 = (RooFitResult*) model1.fitTo(dh2,
98 RooFit::SumW2Error(
false),
99 RooFit::PrintLevel(-1),
100 RooFit::Verbose(
false),
103 if (result1 == NULL) {
104 THROW(
JValueOutOfRange,
"JTestPoissonLogLikelihoodRatioBeestonBarlow::test(): Unable to retrieve fit results");
109 for (
int i=1 ; i <= h1->GetNbinsX() ; ++i) {
110 for (
int j=1 ;
j <= h1->GetNbinsY() ; ++
j) {
111 for (
int k=1 ; k <= h1->GetNbinsZ() ; ++k) {
113 const double n = h2->GetBinContent(i,
j,k);
116 nll2 += -
n*log(
n) + log(tgamma(
n+1)) +
n;
124 const double nllratio = 2 * (result1->minNll() - nll2);
125 const bool passed = (nllratio <
threshold);
129 TH2* h3 = result1->correlationHist();
130 h3->SetTitle(title.
getTitle().c_str());
147 std::istream&
read(std::istream& in)
override
#define THROW(JException_t, A)
Marco for throwing exception with std::ostream compatible message.
#define MAKE_STRING(A)
Make string.
Class dedicated to standardize the title of the graphical objects produced by the JTest_t() derived c...
std::string getTitle() const
Returns a standard string to be used as title of a graphical root object.
Implementation of the Poisson log-likelihood ratio test.
std::istream & read(std::istream &in) override
Read test parameters from input.
double threshold
threshold chi-square to decide if test is passed.
JTestPoissonLogLikelihoodRatioBeestonBarlow()
Default constructor.
void test(const TObject *o1, const TObject *o2) override
Applies a Poissonian log-likelihood ratio test to the two given histograms.
Interface to read input and write output for TObject tests.
const std::string resultType
test result type
const std::string testName
test name
Auxiliary class to handle file name, ROOT directory and object name.
Exception for accessing a value in a collection that is outside of its range.
This name space includes all other name spaces (except KM3NETDAQ, KM3NET and ANTARES).
Structure containing the result of the test.