various ways to handle bkg for single histo fits

src/include/PRunAsymmetry.h

@@ -59,10 +59,10 @@ class PRunAsymmetry : public PRunBase
     double fFitStopTime;
     unsigned int fNoOfFitBins;
 
-    vector<double> fForward;     ///< forward histo data
-    vector<double> fForwardErr;  ///< forward histo errors
-    vector<double> fBackward;    ///< backward histo data
-    vector<double> fBackwardErr; ///< backward histo errors
+    PDoubleVector fForward;     ///< forward histo data
+    PDoubleVector fForwardErr;  ///< forward histo errors
+    PDoubleVector fBackward;    ///< backward histo data
+    PDoubleVector fBackwardErr; ///< backward histo errors
 
     bool SubtractFixBkg();
     bool SubtractEstimatedBkg();

src/include/PRunSingleHisto.h

@@ -57,6 +57,9 @@ class PRunSingleHisto : public PRunBase
     double fFitStartTime;
     double fFitStopTime;
     unsigned int fNoOfFitBins;
+    double fBackground;         ///< needed if background range is given. In units per bin
+
+    bool EstimateBkg(unsigned int histoNo);
 };
 
 #endif // _PRUNSINGLEHISTO_H_