void HitMap_Chip(std::string fileName = "/Users/mxliu/work/mvtx/analysis/NoiseOccupancy_190612_094328_Chip0.dat"){

//gStyle->SetStat(0);
TGraph2D *graph = new TGraph2D(fileName.c_str());

//graph->GetXaxis()->SetRangeUser(0, 511);
//graph->GetYaxis()->SetRangeUser(0,1023);
Int_t nPoints = graph->GetN();
graph->SetPoint(nPoints+1, 0,0,0);
graph->SetPoint(nPoints+2, 511, 1023, 0);
graph->GetZaxis()->SetRangeUser(1, 1e4);
//graph->Draw("col");
//graph->Draw("cont");
graph->Draw("lego");

}