Refs #4531. Third histogram (spectra) created for Tosca Runs via CTE.

"Summary" property with value "Average" added to TOSCA parameter file.
Values of Average and Sum add respective histograms to the resultant
workspace of any run loaded through the CTE interface.

Code/Mantid/instrument/TOSCA_Parameters.xml

@@ -14,7 +14,7 @@
 <parameter name="refl-graphite" type="string">
     <value val="002" />
 </parameter>
-
+  
 <!-- This parameter will be taken as a default value for the rebinning of
         the data in DeltaE. The existence of the parameter will make rebinning
         the default, as opposed to not rebinning.
@@ -49,6 +49,10 @@
 <parameter name="Workflow.Masking" type="string">
     <value val="IdentifyNoisyDetectors" />
 </parameter>
+<!-- Available options are "average", "sum", or "none". -->
+<parameter name="Workflow.Summary" type="string">
+    <value val="Average" />
+</parameter>
 
 </component-link>
 

Code/Mantid/scripts/Inelastic/inelastic_indirect_reducer.py

@@ -92,7 +92,12 @@ def _setup_steps(self):
                 self.append_step(steps.FoldData())
             else:
                 return
-
+
+        # "Summary" adds another histogram onto the end of the resultant workspaces.
+        # "none", "sum" or "average" are currently supported.
+        step = steps.Summary(MultipleFrames=self._multiple_frames)
+        self.append_step(step)
+
         # The "SaveItem" step saves the files in the requested formats.
         if (len(self._save_formats) > 0):
             step = steps.SaveItem()

Code/Mantid/scripts/Inelastic/inelastic_indirect_reduction_steps.py

@@ -577,6 +577,58 @@ def _ws_in_range(self, ranges, xval):
             if ( xval >= range[0] and xval <= range[1] ): result += 1
         return result
 
+class Summary(ReductionStep):
+    """
+    Adds an extra histogram to the workspace(s) that result from the reduction.
+    The options are:
+    
+    * "Sum" - the sum of all the other histograms in the workspace.
+    * "Average" - the average of all the other histograms in the workspace.
+    * "None" - no extra histogram is added.
+    """
+
+    _multiple_frames = False
+
+    def __init__(self, MultipleFrames=False):
+        super(Summary, self).__init__()
+        self._multiple_frames = MultipleFrames
+
+    def execute(self, reducer, file_ws):
+        try: 
+            summary = mtd[file_ws].getInstrument().getStringParameter('Workflow.Summary')[0]
+        except IndexError:
+            return
+
+        if ((summary != "Sum") and (summary != "Average")):
+            return
+
+        if ( self._multiple_frames ):
+            try:
+                workspaceNames = mtd[file_ws].getNames()
+            except AttributeError:
+                workspaceNames = [file_ws]
+        else:
+            workspaceNames = [file_ws]
+
+        for wsName in workspaceNames:
+            try:
+                ws = mtd[wsName]
+            except:
+                continue
+            nSpec = ws.getNumberHistograms()
+            if (nSpec == 0):
+                continue
+            tempName = wsName + '_temp_sum'
+            SumSpectra(InputWorkspace=wsName, OutputWorkspace=tempName)
+
+            if (summary == 'average'):
+                tempWs = mtd[tempName]
+                tempWs /= nSpec
+            # Note: Detector info of the output becomes spurious as there will be a third entry for a detector 
+            # that does not exist.
+            ConjoinWorkspaces(wsName, tempName, False)
+
+
 class ConvertToEnergy(ReductionStep):
     """
     """