syst. check that reads the MC information for the case of TPC-only

[u/mrichter/AliRoot.git] / PWG0 / AliCorrectionMatrix.cxx

diff --git a/PWG0/AliCorrectionMatrix.cxx b/PWG0/AliCorrectionMatrix.cxx
index 2407b4f260daf49c965ba3cb480492f599ac0341..82fac7236e0832df5fa3e49fb96093e55722df4c 100644 (file)
--- a/PWG0/AliCorrectionMatrix.cxx
+++ b/PWG0/AliCorrectionMatrix.cxx
@@ -160,8 +160,10 @@ void AliCorrectionMatrix::Divide()
   // divides generated by measured to get the correction
   //
 
-  if (!fhMeas || !fhGene || !fhCorr)
+  if (!fhMeas || !fhGene || !fhCorr) {
+    AliDebug(AliLog::kError, "measured or generated histograms not available");
     return;
+  }
 
   fhCorr->Divide(fhGene, fhMeas, 1, 1, "B");
 
@@ -354,5 +356,19 @@ void AliCorrectionMatrix::SetCorrectionToUnity()
   for (Int_t x=1; x<=fhCorr->GetNbinsX(); ++x)
     for (Int_t y=1; y<=fhCorr->GetNbinsY(); ++y)
       for (Int_t z=1; z<=fhCorr->GetNbinsZ(); ++z)
+      {
         fhCorr->SetBinContent(x, y, z, 1);
+        fhCorr->SetBinError(x, y, z, 0);
+      }
+}
+
+//____________________________________________________________________
+void AliCorrectionMatrix::Scale(Double_t factor)
+{
+  // scales the generated and measured histogram with the given factor
+
+  Printf("Scaling histograms with %f", factor);
+
+  fhMeas->Scale(factor);
+  fhGene->Scale(factor);
 }