Index: /trunk/MagicSoft/Mars/Changelog
===================================================================
--- /trunk/MagicSoft/Mars/Changelog	(revision 5739)
+++ /trunk/MagicSoft/Mars/Changelog	(revision 5740)
@@ -31,4 +31,5 @@
        calculate the joint probability of Chisquare of pixel "pixidx"
        and fNdf
+     - added documentation of data members
      - raised version number by 1
 
Index: /trunk/MagicSoft/Mars/msignal/MExtractedSignalCam.cc
===================================================================
--- /trunk/MagicSoft/Mars/msignal/MExtractedSignalCam.cc	(revision 5739)
+++ /trunk/MagicSoft/Mars/msignal/MExtractedSignalCam.cc	(revision 5740)
@@ -51,5 +51,5 @@
     : fFirstUsedSliceHiGain(0), fFirstUsedSliceLoGain(0),
       fLastUsedSliceHiGain(0), fLastUsedSliceLoGain(0), 
-      fUsedWindowHiGain(0.), fUsedWindowLoGain(0.)
+      fUsedWindowHiGain(0.), fUsedWindowLoGain(0.), fNdf(-1)
 {
     fName  = name  ? name  : "MExtractedSignalCam";
@@ -114,4 +114,13 @@
 }
 
+Float_t MExtractedSignalCam::GetProb( const Int_t pixidx )   const
+{ 
+
+  if (pixidx > GetSize()-1)
+    return -1.;
+  
+  return TMath::Prob((*this)[pixidx].GetChisquare(),fNdf); 
+}
+
 void MExtractedSignalCam::Clear(Option_t *o)
 {