LandauGauss

Script that fits a given histogram with a Landau Gauss Function

Installation

To install the program you need a c++ 11 compiler, Cmake and CERN ROOT.

After downloading create with cmake the make/Project files for your build system.

> git clone <url>  <your_path>\landau_gauss
> cd <your_path>\landau_gauss\build
> cmake ..

On Linux:

> make  
> make install

On Windows:

> msbuild INSTALL.vcxproj /P:configuration=release

Known Problems

On Linux cmake has some problems finding ROOT. I don’t know yet how to solve it.

Using

Example code:

  landgausFit fit;
  
  fit.setStartAmplitude(100);
  fit.setLimits_Amplitude(95, 100);
  fit.setLimits_GaussSigma(0, 200);
  fit.setLimits_LandauMP(0, 500);
  fit.setLimits_LandauSigma(0, 200);
  fit.setStartGaussSigma(27);
  fit.setStartLandauMean(100);
  fit.setStartLandauSigma(7);
  fit.setFitRange(0,250);
  TGraph * g; // create a data set
  fit(g);  // fit the data set

  fit.printResults(cout);  // you can also print the result to file with this function 
  fit.DrawfitFunction(); // draws the dataset with the fit function 
  fit.saveFitToFile(“test.txt”) // saves details about the fit