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method to get fit p-value from fit interface

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This commit is contained in:
Antonin Portelli 2015-11-25 18:29:31 +00:00
parent 25698fc6b2
commit e950e18639
5 changed files with 19 additions and 2 deletions
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5
examples/exFit.cpp
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@ -39,8 +39,9 @@ int main(void)
data.fitAllPoints();
p = data.fit(minimizer, init, f);
cout << "a= " << p(0) << " b= " << p(1)
<< " chi^2/ndof= " << p.getChi2PerDof() << endl;
cout << "a= " << p(0) << " b= " << p(1);
cout << " chi^2/ndof= " << p.getChi2PerDof();
cout << " p-value= " << p.getPValue() <<endl;
// plot result
Plot plot;

7
lib/XYSampleData.cpp
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@ -18,10 +18,12 @@
*/
#include <LatAnalyze/XYSampleData.hpp>
#include <LatAnalyze/Math.hpp>
#include <LatAnalyze/includes.hpp>
using namespace std;
using namespace Latan;
using namespace Math;
/******************************************************************************
* SampleFitResult implementation *
@ -51,6 +53,11 @@ double SampleFitResult::getNDof(void) const
return static_cast<double>(nDof_);
}
double SampleFitResult::getPValue(const Index s) const
{
return chi2PValue(getChi2(s), getNDof());
}
const DoubleFunction & SampleFitResult::getModel(const Index s,
const Index j) const
{

1
lib/XYSampleData.hpp
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@ -47,6 +47,7 @@ public:
double getChi2PerDof(const Index s = central) const;
DSample getChi2PerDof(const PlaceHolder ph) const;
double getNDof(void) const;
double getPValue(const Index s = central) const;
const DoubleFunction & getModel(const Index s = central,
const Index j = 0) const;
const DoubleFunctionSample & getModel(const PlaceHolder ph,

7
lib/XYStatData.cpp
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@ -19,9 +19,11 @@
#include <LatAnalyze/XYStatData.hpp>
#include <LatAnalyze/includes.hpp>
#include <LatAnalyze/Math.hpp>
using namespace std;
using namespace Latan;
using namespace Math;
/******************************************************************************
* FitResult implementation *
@ -42,6 +44,11 @@ double FitResult::getNDof(void) const
return static_cast<double>(nDof_);
}
double FitResult::getPValue(void) const
{
return chi2PValue(getChi2(), getNDof());;
}
const DoubleFunction & FitResult::getModel(const Index j) const
{
return model_[static_cast<unsigned int>(j)];

1
lib/XYStatData.hpp
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@ -48,6 +48,7 @@ public:
double getChi2(void) const;
double getChi2PerDof(void) const;
double getNDof(void) const;
double getPValue(void) const;
const DoubleFunction & getModel(const Index j = 0) const;
private:
double chi2_{0.0};