Athena Tip

pkgco.py -A TrkSpaceTimePoint  //check out the head version
pkgco.py TrkSpaceTimePoint // check out the same version in the release
avn.py switch @TRUNK// change it in head version to commit
avn.py lstags [package name]// list of tags 
avn.py ci -m "message "
avn tag TAG -m "message"

ROOT Tip

//..For publication, you should generally use fewer axis tick marks.
//  On the y axis, for example, this gives approximately 4 major and 2
//  minor divisions. -204 would give exactly 4 and 2. 
  hmassJpsi_sig->GetXaxis()->SetNdivisions(505);
  hmassJpsi_sig->GetYaxis()->SetNdivisions(204);


TCanvas* c1 = new TCanvas("c1","", 0,0,1200,600);
c1->Divide(3,2);
c1->cd(1);
hmassJpsi->Draw();
c1->cd(2);

Unix...

Standard Library

vector sort

  vector pTs;

  pTs.push_back(1);
  pTs.push_back(0.1);
  pTs.push_back(0.5);

  sort(pTs.begin(), pTs.end());

  cout << pTs[0] << " " << pTs[1] << " " << pTs[2] << endl;

> 0.1 0.5 1

Remove special character in string

  string period= "L1Calo Stream ABC";
  string period2 ="";
  for (UInt_t i=0; i<period.size(); ++i) {
    string selPeriod( period, i, 1);
    if (selPeriod.find(" ")) {
      period2 = period2 + selPeriod;
    }
  }

  cout << period << endl;
  cout << period2 << endl;

> L1Calo Stream ABC
> L1CaloStreamABC

 TFileCollection* fileColl = new TFileCollection("fileColl");
  fileColl->AddFromFile("input.txt");

  TChain *c = new TChain("susy");
  c->AddFileInfoList(fileColl->GetList());



          std::vector < double, std::allocator < double > >::iterator pkit
            = std::max_element( charges.begin(), charges.end() );



cp -pr file dir/
-p option preserve time stamp.


sshfs -p 555 wpark@strange.physics.sc.edu:/atlasdisk4/ /atlasdisk4/ -o allow_other 

float myMaxPt( std::vector< float > * theVec  )
{
float max = 0;
for (int z = 0; z< theVec->size(); z++ )
{
if ( theVec->at(z) > max ) max = heVec->at(z);
}

return max;
}

Then, in the Draw function:

chain.Draw(">>elist","(el_n >= 1 && myMaxPt(el_pt) > 15000.0)")

-- WooChunPark - 30-Aug-2010