message: adapt lower limit of y axis of vertex plots
diff: @@ -2118,7 +2118,8 @@ if(hMeanVx->GetEntries()>0){
  //
  ymin = hMeanVx->GetMinimum();
  ymax = hMeanVx->GetMaximum();
  - hMeanVx->SetMinimum(0.9*ymin);
  + if(ymin>-10.)hMeanVx->SetMinimum(0.9*ymin);
  + else hMeanVx->SetMinimum(0.)
  hMeanVx->SetMaximum(1.1*ymax);
  //
  // hMeanVx->SetMinimum(0.065);
  @@ -2143,7 +2144,8 @@ if(hMeanVx->GetEntries()>0){
  cVertexDisto->cd(2);
  ymin = hMeanVy->GetMinimum();
  ymax = hMeanVy->GetMaximum();
  - hMeanVy->SetMinimum(0.9*ymin);
  + if(ymin>-10.)hMeanVy->SetMinimum(0.9*ymin);
  + else hMeanVy->SetMinimum(0.)
  hMeanVy->SetMaximum(1.1*ymax);
  // if(hMeanVySPD->GetEntries()>0){ // pp runs
  @@ -2165,7 +2167,8 @@ if(hMeanVx->GetEntries()>0){
  cVertexDisto->cd(3);
  ymin = hMeanVz->GetMinimum();
  ymax = hMeanVz->GetMaximum();
  - hMeanVz->SetMinimum(0.9*ymin);
  + if(ymin>-10.)hMeanVz->SetMinimum(0.9*ymin);
  + else hMeanVz->SetMinimum(0.)
  hMeanVz->SetMaximum(1.1*ymax);
  // hMeanVz->SetMinimum(-8.);
  // hMeanVz->SetMaximum(8.);
  @@ -2201,6 +2204,11 @@ if(hMeanVx->GetEntries()>0){
  // hSigmaVz->SetMaximum(10.);
  hSigmaVz->GetYaxis()->SetTitle("sigma on z coordinate");
  hSigmaVz->GetXaxis()->SetTitle("run number");
  + ymin = hSigmaVz->GetMinimum();
  + ymax = hSigmaVz->GetMaximum();
  + if(ymin>0.)hSigmaVz->SetMinimum(0.9*ymin);
  + else hSigmaVz->SetMinimum(0.)
  + hMeanVz->SetMaximum(1.1*ymax);
  hSigmaVz->Draw();
  if(hSigmaVzSPD->GetBinContent(1)>0)hSigmaVzSPD->Draw("same");
  if(hSigmaVzOCDB->GetBinContent(1)>-500.)hSigmaVzOCDB->Draw("same");
  