The routine varies the width of the resolution file to give a 'stretch factor' and the area provides an intensity normalisation factor. The fitted parameters are in the group workspace with suffix _ResNorm with additional suffices of Intensity & Stretch. The fitted data are in the workspace ending in _ResNorm_Fit.
This routine was originally part of the MODES package.
Example - a basic example using ResNorm.
- def createSampleWorkspace(name, random=False):
""" Creates a sample workspace with a single lorentzian that looks like IRIS data""" import os function = "name=Lorentzian,Amplitude=8,PeakCentre=5,FWHM=0.7" ws = CreateSampleWorkspace("Histogram", Function="User Defined", UserDefinedFunction=function, XUnit="DeltaE", Random=True, XMin=0, XMax=10, BinWidth=0.01) ws = CropWorkspace(ws, StartWorkspaceIndex=0, EndWorkspaceIndex=9) ws = ScaleX(ws, -5, "Add") ws = ScaleX(ws, 0.1, "Multiply")
#load instrument and instrument parameters LoadInstrument(ws, InstrumentName='IRIS') path = os.path.join(config['instrumentDefinition.directory'], 'IRIS_graphite_002_Parameters.xml') LoadParameterFile(ws, Filename=path) ws = RenameWorkspace(ws, OutputWorkspace=name) return ws
ws = createSampleWorkspace("irs26173_graphite002_red", random=True) res = createSampleWorkspace("irs26173_graphite002_res")
ResNorm(VanNumber='26176', ResNumber='26173', InputType='Workspace', ResInputType='Workspace', Instrument='irs', Analyser='graphite002', Plot='None')