This example creates a 2D histogram with the name "hist" and a title "Example 2D Histogram". It has 100 bins in both the X and Y directions, ranging from 0 to 100. The for-loop fills the histogram with 1000 random points generated with Gaussian distributions centered at (50,50) with standard deviation of 10. The weight given to each point is 1.0. Example 2:c++ // Package library: GEANT4 TH2F* energyDeposition = new TH2F("energyDeposition", "Energy Deposited in Detector", 100, -10, 10, 100, -10, 10); for(auto hit : hitsCollection) { G4double x = hit->GetPos().getX(); G4double y = hit->GetPos().getY(); G4double edep = hit->GetEdep(); energyDeposition->Fill(x, y, edep); } ``` This example uses the GEANT4 package library to simulate the energy deposition in a detector. The TH2F histogram "energyDeposition" is created with 100 bins in both the X and Y directions, ranging from -10 to 10. In the for-loop, each hit in the collection is analyzed to get its position and the amount of energy deposited (edep) in that hit. The Fill function is called with the X, Y coordinates and edep value for each hit. This results in a 2D histogram showing the energy deposited in different positions of the detector.