Writing part of the TMVA screen output in a file

TMVA
1

Hi
I am doing BDT analysis with multiple backgrounds and multiple points in the signal phase-space (one at a time). Currently, I am optimising the analysis with the following line

TMVA::mvaeffs(DataLoaderName,outfileName,sig_evt,bkg_evt,true,"RooStats::AsimovSignificance(S,B+0.01)");

So, I wanted to know if the responses (like the one below) to the above line can be written in an ASCII file for different signal files.

image
image924×140 19.2 KB

Or, maybe if it is possible all the signal files be fed ad analysed and printed in a similar table with each row having info on each signal file.

Appreciate any help.

Regards,
Saumyen

2

Hi,

You can alway re-direct the output to a file, or alternatively you can take the original code from root/mvaeffs.cxx at master · root-project/root · GitHub
and create a similar functions, and customise as you prefer.

Lorenzo

3

Thank you so much @moneta for the help.

So, I tried writing a function exactly the same as TMVA::StatDialogMVAEffs::PrintResults just with the modification that it prints in a given file instead of the screen (using cout). The first few lines are as follows:

void TMVA::StatDialogMVAEffs::WriteResults( const MethodInfo* info )
{
   ofstream fout;
   fout.open("/home/saumyen/significance.txt",ios::app);

Just wanted to know if I want to give the file name as an argument like void TMVA::StatDialogMVAEffs::WriteResults( const MethodInfo* info, TString fOut){
and want to feed it via the function TMVA::mvaeffs (adding an extra argument), how should I do this?

Could you please help me with this?

Thanks again.

Regards,
Saumyen

4

Hi,
You can add the string representing the fileName as a new data member of the StatDialogMVAEffs and you pass it in the constructor of the class.
For example:

void TMVA::mvaeffs(TString dataset, TString fin, Float_t nsignal, Float_t nbackground, Bool_t useTMVAStyle,TString formula, String fileOut) 
{
....................
......................
StatDialogMVAEffs* gGui = new StatDialogMVAEffs(dataset,
      (graphicsClient) ? graphicsClient->GetRoot() : nullptr, nsignal, nbackground, fileOut);
.....................
}

and you modiffy the class StatDialogMVAEffs to add the snew data member that can then be used in your new function WriteResults.

Lorenzo