Add doctest for ElasticWindowMultiple Refs #11885

Code/Mantid/docs/source/algorithms/ElasticWindowMultiple-v1.rst

@@ -19,4 +19,58 @@ either sample temperature or run number of temperature is not available.
 The ELT workspace shows the normalisation of the ELF workspace to run with the
 lowest sample temperature.
 
+Usage
+-----
+
+.. testcode:: exElasticWindowMultiple
+
+    # Create some sample data
+    widths = [15.0, 17.5, 20.0, 22.5, 25.0, 27.5, 30.0]
+    for idx, fwhm in enumerate(widths):
+        ws_name = 'ws_%.1f' % fwhm
+        function = 'name=Lorentzian,Amplitude=100,PeakCentre=27500,FWHM=%f' % fwhm
+        CreateSampleWorkspace(Function='User Defined',
+                              UserDefinedFunction=function,
+                              XMin=27000,
+                              XMax=28000,
+                              BinWidth=10,
+                              NumBanks=1,
+                              OutputWorkspace=ws_name)
+
+        ConvertUnits(InputWorkspace=ws_name,
+                     OutputWorkspace=ws_name,
+                     Target='DeltaE',
+                     EMode='Indirect',
+                     EFixed=1.555)
+
+        Rebin(InputWorkspace=ws_name,
+               OutputWorkspace=ws_name,
+               Params=[-0.2,0.004,0.2])
+
+        LoadInstrument(Workspace=ws_name,
+                       InstrumentName='IRIS')
+
+        SetInstrumentParameter(Workspace=ws_name,
+                               ParameterName='Efixed',
+                               DetectorList=range(1,114),
+                               ParameterType='Number',
+                               Value='1.555')
+
+        mtd[ws_name].mutableRun()['run_number'] = idx + 1
+
+    input = GroupWorkspaces(InputWorkspaces=['ws_%.1f' % fwhm for fwhm in widths])
+
+    # Run the algorithm
+    q, q2, elf = ElasticWindowMultiple(input, -0.1, 0.1)
+
+    print 'ELF X axis: %s' % elf.getAxis(0).getUnit().caption()
+    print 'ELF spectra count: %d' % elf.getNumberHistograms()
+    print 'ELF bin count: %d' % elf.blocksize()
+
+.. testoutput:: exElasticWindowMultiple
+
+    ELF X axis: Run No
+    ELF spectra count: 100
+    ELF bin count: 7
+
 .. categories::