1. E906 Data Analysis Frame (II) Jia-Ye Chen 2010.10.13

2. Contents  Motivations  Analysis Frame  Locations  Events Rebuild (structure)  Functions Upgrade  Main Frame  Data Analysis (class)  Define Class  Main Frame

3. Motivations (I)  Following the data extracted from mySQL database by ROOT-base program, to rebuild the event stream data formation instead of mySQL table structure include “event”, “run”, “spill”, “mdimuon”, “mtrack” and “mhit”. The main purpose is to rearrange all information associated within the same physics event, rather than separate in different tables.  Instead of “Tree/Branch/Leaf”, a 2-Level data formation “Tree/Leaf” was implemented, where the “Branch” is same as the “Leaf”. [jychen@ipas012 src]$root dimuon.cc root[0] Processing dimuon.cc Warning in : /sp8data11/shyao/rootfile/r290.root: not a TStreamInfo object

4. Motivations (II)  Bring in the “Class” in C++ programming from the default ROOT function “makeClass”, one step further than “structure” in C programming. And also, to simplify the data access by reading Tree rather than massive “br?->GetEntry(i)”. (GetEntries / GetEntry)  The sub-purpose is to remove multi-declared information, such as “eventID”, “runID”, “trackID” and so on.

5. Analysis Frame – Locations ipas012.phys.sinica.edu.tw  Event Rebuild  Directory : /usrX/jychen/e906/eventRebuild  Header files :./include.v5/*.h  Source files :./src.v6/*.cc  Data Analysis  Directory : /usrX/jychen/e906/dimuonAna  Header files :./include/*.h  Source files :./src/*.cc

6. Analysis Frame – Event Rebuild  Functions upgrade  logger.cc : save the log and generate the file “dimuon.log” in the directory “../bin”.  error.cc : save the error messages and generate the file “dimuon.err” in the directory “../bin”.  readSwitch.cc : read the switch file from “switch.in” from the directory “../bin”.  trackInit.cc : initialize the temporary track structure by inputting the initial values.  branchBuild.cc : rebuild the branch list for event stream structure.  eventReconstruct.cc : reconstruct the event stream.  eventFill.cc : fill the new event-stream data into new output ROOT file.

7. Analysis Frame – Event Rebuild  main file : dimuon.cc int dimuon(){ char switchFile[100] = "../bin/switch.in"; char errorLogFile[100] = "dimuon"; char logFile[100] = "dimuon"; // Open this error log file if ( openErrorLog(errorLogFile) ) return (FILE_ERR); // Open this log file if ( openLogFile(logFile) ) return (FILE_ERR); // reading switch file : "../bin/switch.in" if ( readSwitch(switchFile, &sw) ) return (FILE_ERR); // Open a.root file TFile *f = new TFile("/sp8data11/shyao/rootfile/r290.root"); // build Branch:Leaf table branchBuild( tree2, &columnTracks ); // construct event stream for ( int eventNum=0; eventNum < 2 ; eventNum++ ){ // track initialization trackInit( tracks, ntrk ); // event reconstruction : rearrangement for ( int j=tmpTrack1; j <= tmpTrack2; j++ ){ eventReconstruct( &event, &mtrack, tracks, &H, tmpTrack1); } // j Loop // event reconstruction : filling eventFill( &columnTracks, tracks, ntrk ); // tree filling tree2->Fill(); } // eventNum Loop

8. Analysis Frame – Data Analysis  class file : ana.h #ifndef ANA_h #define ANA_h #include "../include/arraySize" class ana { public : TTree *fChain; // Declaration of leaf types Int_t numTracks; Double_t trk_p0[MAX_TRACK][4]; Double_t trk_pf[MAX_TRACK][4]; // List of branches TBranch *b_numTracks; TBranch *b_trk_p0; TBranch *b_trk_pf; virtual void Init(); virtual void Loop(); virtual void SetBranch(TTree *tree); }; #endif

9. Analysis Frame – Data Analysis  main file : main.cc void main(){ ana t; t.Init(); t.SetBranch(tree2); t.Loop(); } ana::Init(){ TFile *f = new TFile("outputFile/test2.root"); TTree *tree2 = (TTree*)f->Get("tree2"); } void ana::SetBranch(TTree *tree){ fChain = tree; fChain->SetBranchAddress("numTracks", &numTracks, &b_numTracks); fChain->SetBranchAddress("trk_p0", trk_p0, &b_trk_p0); fChain->SetBranchAddress("trk_pf", trk_pf, &b_trk_pf); } void ana::Loop(){ Int_t nentries = fChain->GetEntriesFast(); for (Int_t iEvent=0; iEvent < nentries; iEvent++){ fChain->GetEntry(iEvent); cout << numTracks << endl; }