Fix off-by-one error in IkedaCarpenterModerator model.

If the value from the sample table is nearer the last edge then simply returns the last value. Refs #7548
mantidproject · Oct 28, 2013 · 9069db1 · 9069db1
1 parent ae99fb0
commit 9069db1
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/Code/Mantid/Framework/API/src/IkedaCarpenterModerator.cpp b/Code/Mantid/Framework/API/src/IkedaCarpenterModerator.cpp
@@ -212,7 +212,11 @@ namespace Mantid
       const unsigned int nsteps = (m_lookupSize - 1);
       const unsigned int indexBelow = static_cast<unsigned int>(std::floor(area*nsteps));
       const double step = area*nsteps - indexBelow;
-      return m_areaToTimeLookup[indexBelow]*(1.0 - step) + m_areaToTimeLookup[indexBelow + 1]*step;
+      if(indexBelow < nsteps )
+        return m_areaToTimeLookup[indexBelow]*(1.0 - step) + m_areaToTimeLookup[indexBelow + 1]*step;
+      else
+        return m_areaToTimeLookup[indexBelow]; // last edge value
+
     }