width = w.factory('%s_effsigma[3, 0.1, 20]' % pdfname) pdf = ParametrizedKeysPdf(pdfname + '_pkeys', pdfname + '_pkyes', mmgMass, peak, width, sdata, ROOT.RooKeysPdf.NoMirror, 1.5) savrange = (mmgMass.getMin(), mmgMass.getMax()) normrange = (40, 130) fitrange = (60, 120) mmgMass.setRange(*fitrange) peak.setVal(pdf.shapemode) width.setVal(pdf.shapewidth) pdf.fitTo(sdata, roo.Range(*fitrange), roo.Strategy(2)) w.Import(pdf) ## peak.setConstant() ## width.setConstant() hist = pdf.createHistogram(pdfname + '_hist', mmgMass, roo.Binning(1000)) dhist = ROOT.RooDataHist(pdfname + '_dhist', pdfname + '_hist', ROOT.RooArgList(mmgMass), hist) w.Import(dhist) hpdf = w.factory('HistPdf::{name}({{mmgMass}}, {name}_dhist, 1)'.format( name=pdfname )) ## bdata = data.reduce(ROOT.RooArgSet(mmgMass)) ## bdata = bdata.binnedClone(data.GetName() + '_binned', data.GetTitle()) ## pdf = ROOT.RooHistPdf(pdfname, pdfname, ROOT.RooArgSet(mmgMass), bdata, 2) pdf.Print() # w.Import(pdf) rpdflist.append(pdfname) ## Store the target parameters in the workspaces phoScaleTarget.setVal(starget) phoResTarget.setVal(rtarget)
def __init__(self, name, title, mass, phos, phor, data, workspace, phostarget, phortargets, rho=1.5, mirror=ROOT.RooKeysPdf.NoMirror, mrangetrain=(40,140), mrangenorm=(50,130), mrangefit=(60,120)): '''PhosphorModel4(str name, str title, RooRealVar mass, RooRealVar phos, RooRealVar phor, RooDataSet data, float phostarget, [float] phortargets, float rho=1.5, int mirror=ROOT.RooKeysPdf.NoMirror) name - PDF name title - PDF title mass - mumugamma invariant mass (GeV), observable phos - photon energy scale (%), parameter phor - photon energy resolution (%), paramter data - (mmMass, mmgMass, phoERes = 100*(phoEreco/phoEgen - 1), dataset on which the shapes of reference PDFs are trained. phostarget - target reference value of the photon energy scale at which the model is being trained phortargetss - a list of target photon energy resolution values for the moment morphing rho - passed to trained RooKeysPdfs mirror - passed to trained RooKeysPdfs ''' ## Attach args. self._name = name self._title = title self._mass = mass self._phos = phos self._phor = phor self._data = data self._phostarget = phostarget self._phortargets = phortargets[:] self._rho = rho self._mirror = mirror ## Attach other attributes. self._massrange = (mass.getMin(), mass.getMax()) self._sdata_list = [] self._phostrue_list = [] self._phortrue_list = [] self._dlogm_dphos_list = [] self._msubs_list = [] self._keys_pdfs = [] self._keys_modes = [] self._keys_effsigmas = [] self._keys_fitresults = [] self._pdfs = [] self._custs = [] self._pdfrefs = [] self._mrefs = [] self._workspace = workspace ## self._workspace = ROOT.RooWorkspace(name + '_workspace', ## title + ' workspace') w = self._workspace self.w = w ## Import important args in workspace. # w.Import(ROOT.RooArgSet(mass, phos, phor)) w.Import(mass) w.Import(phos) w.Import(phor) w.Import(self._data) w.factory( 'ConstVar::{name}_phostarget({value})'.format( name=name, value=self._phostarget ) ) ## Define the morphing parameter. This an identity with the ## photon resolution for now. mpar = self._mpar = w.factory( 'expr::{name}_mpar("{phor}", {{{phor}}})'.format( ## 'expr::{name}_mpar("sqrt(3^2 + {phor}^2)", {{{phor}}})'.format( ## 'expr::{name}_mpar("2.325+sqrt(0.4571 + (0.1608*{phor})^2)", {{{phor}}})'.format( name=name, phor=phor.GetName() ) ) ## Define the formula for dlog(m)/dphos. self._dlogm_dphos_func = w.factory(''' expr::dlogm_dphos_func("0.5 * (1 - mmMass^2 / mmgMass^2) * mmgMass", {mmMass, mmgMass}) ''') ## Get the calibrator. self._calibrator = MonteCarloCalibrator(self._data) ## Loop over target reference photon energy resolutions in phortargets. for index, phortarget in enumerate(self._phortargets): ## Store the target photon resolution value. w.factory( 'ConstVar::{name}_phortarget_{index}({value})'.format( name=name, index=index, value=phortarget ) ) ## Get the corresponding smeared RooDataSet sdata named ## {name}_sdata_{index} and attach it to self._sdata sdata = self._calibrator.get_smeared_data( self._phostarget, phortarget, name + '_sdata_%d' % index, title + ' sdata %d' % index, ## Get the true scale and resolution with errors. (This can be ## added to the calibrator and snapshots of ## self._calibrator.s and self._calibrator.r stored as ## {name}_sdata_{index}_sr in self._calibrator.w) dofit=True ) self._sdata_list.append(sdata) w.Import(sdata) phostrue = ROOT.RooRealVar(self._calibrator.s, name + '_phostrue_%d' % index) phortrue = ROOT.RooRealVar(self._calibrator.r, name + '_phortrue_%d' % index) phostrue.setConstant(True) phortrue.setConstant(True) self._phostrue_list.append(phostrue) self._phortrue_list.append(phortrue) w.Import(phostrue) w.Import(phortrue) ## Calculate the dlogm/dphos {name}_dlogm_dphos_{index} ## for the smeared dataset. sdata.addColumn(self._dlogm_dphos_func) dlogm_dphos = w.factory( ''' {name}_dlogm_dphos_{index}[{mean}, 0, 1] '''.format(name=name, index=index, mean=sdata.mean(sdata.get()['dlogm_dphos_func'])) ) dlogm_dphos.setConstant(True) self._dlogm_dphos_list.append(dlogm_dphos) ## Define the mass scaling {name}_msubs{i} introducing ## the dependence on phos. This needs self._calibrator.s and ## dlogm_dphos. ## msubs = w.factory( ## ''' ## cexpr::{msubs}( ## "{mass}*(1 - 0.01 * {dlogm_dphos} * ({phos} - {phostrue}))", ## {{ {mass}, {dlogm_dphos}, {phos}, {phostrue} }} ## ) ## '''.format(msubs = name + '_msubs_%d' % index, ## mass = self._mass.GetName(), ## dlogm_dphos = dlogm_dphos.GetName(), ## phos = self._phos.GetName(), ## phostrue = phostrue.GetName()) ## ) ## msubs = w.factory( ## ''' ## LinearVar::{msubs}( ## {mass}, ## expr::{slope}( ## "(1 - 0.01 * {dlogm_dphos} * ({phos} - {phostrue}))", ## {{ {dlogm_dphos}, {phos}, {phostrue} }} ## ), ## 0 ## ) ## '''.format(msubs = name + '_msubs_%d' % index, ## slope = name + '_msubs_slope_%d' % index, ## mass = self._mass.GetName(), ## dlogm_dphos = dlogm_dphos.GetName(), ## phos = self._phos.GetName(), ## phostrue = phostrue.GetName()) ## ) msubs = w.factory( ''' LinearVar::{msubs}( {mass}, 1, expr::{offset}( "- 0.01 * {dlogm_dphos} * ({phos} - {phostrue})", {{ {dlogm_dphos}, {phos}, {phostrue} }} ) ) '''.format(msubs = name + '_msubs_%d' % index, offset = name + '_msubs_offset_%d' % index, mass = self._mass.GetName(), dlogm_dphos = dlogm_dphos.GetName(), phos = self._phos.GetName(), phostrue = phostrue.GetName()) ) self._msubs_list.append(msubs) ## Build the corresponding parametrized KEYS PDF {name}_kyes_{index} ## with {name}_keys_mode_{index} and ## {name}_keys_effsigma_{index}. keys_mode = w.factory( '{name}_keys_mode_{index}[91.2, 60, 120]'.format( name=name, index=index ) ) keys_effsigma = w.factory( '{name}_keys_effsigma_{index}[3, 0.1, 60]'.format( name=name, index=index ) ) mass.setRange(*mrangetrain) keys_pdf = ParametrizedKeysPdf(name + '_keys_pdf_%d' % index, name + '_keys_pdf_%d' % index, mass, keys_mode, keys_effsigma, sdata) self._keys_modes.append(keys_mode) self._keys_effsigmas.append(keys_effsigma) self._keys_pdfs.append(keys_pdf) ## Fit the KEYS PDF to the training data and save the result ## {name}_keys_fitresult_{index} and parameter snapshots ## {name}_keys_mctrue_{index}. mass.setRange(*mrangenorm) keys_fitresult = keys_pdf.fitTo(sdata, roo.Range(*mrangefit), roo.Strategy(2), roo.NumCPU(8), roo.Save(True)) self._keys_fitresults.append(keys_fitresult) w.Import(keys_fitresult, name + '_keys_fitresult_%d' % index) w.saveSnapshot(name + '_mctrue_%d' % index, ','.join([phostrue.GetName(), phortrue.GetName(), keys_mode.GetName(), keys_effsigma.GetName()])) ## Sample the fitted KEYS PDF to a histogram {name}_hist_{index}. mass.setRange(*mrangetrain) hist = keys_pdf.createHistogram(name + '_hist_%d' % index, mass, roo.Binning(1000)) ## Build a RooDataHist {name}_dhist{index} of the sampled histogram. dhist = ROOT.RooDataHist(name + '_dhist_%d' % index, name + '_dhist_%d' % index, ROOT.RooArgList(mass), hist) w.Import(dhist) ## Build a RooHistPdf {name}_pdf_{index} using the dhist and msubs. ## pdf = w.factory( ## 'HistPdf::{name}({{{msubs}}}, {{{mass}}}, {dhist}, 1)'.format( ## name = name + '_pdf_%d' % index, msubs = msubs.GetName(), ## mass = mass.GetName(), dhist = dhist.GetName() ## ) ## ) pdf = w.factory( 'HistPdf::{name}({{{mass}}}, {dhist}, 1)'.format( name = name + '_pdf_%d' % index, msubs = msubs.GetName(), mass = mass.GetName(), dhist = dhist.GetName() ) ) self._pdfs.append(pdf) mass.setRange(*self._massrange) ## Supstitute for mass using customizer. cust = ROOT.RooCustomizer(pdf, 'msubs_%d' % index) self._custs.append(cust) cust.replaceArg(mass, msubs) pdfref = cust.build() pdfref.addOwnedComponents(ROOT.RooArgSet(msubs)) pdfref.SetName(name + '_pdfref_%d' % index) pdfref.SetTitle(name + '_pdfref_%d' % index) w.Import(pdfref) self._pdfrefs.append(pdfref) ## Calculate morphing parameter reference values float mref[index]. phorval = phor.getVal() phor.setVal(phortrue.getVal()) self._mrefs.append(mpar.getVal()) phor.setVal(phorval) ## End of loop over target phortargets ## Define the RooMomentMorph model. model = w.factory( ''' MomentMorph::{name}({mpar}, {{{mass}}}, {{{pdfs}}}, {{{mrefs}}}) '''.format(name=name, mpar=mpar.GetName(), mass=mass.GetName(), pdfs=','.join([f.GetName() for f in self._pdfs]), # pdfs=','.join([f.GetName() for f in self._pdfrefs]), mrefs=','.join([str(m) for m in self._mrefs])) ) ## Quick hack to make things work. cust = ROOT.RooCustomizer(model, 'msub') cust.replaceArg(mass, self._msubs_list[0]) model2 = cust.build() ROOT.RooMomentMorph.__init__(self, model2) self.SetName(name) self.SetTitle(title)
def __init__(self, name, title, mass, phos, phor, data, workspace, phostarget, phortargets, rho=1.5, mirror=ROOT.RooKeysPdf.NoMirror, mrangetrain=(40, 140), mrangenorm=(50, 130), mrangefit=(60, 120)): '''PhosphorModel4(str name, str title, RooRealVar mass, RooRealVar phos, RooRealVar phor, RooDataSet data, float phostarget, [float] phortargets, float rho=1.5, int mirror=ROOT.RooKeysPdf.NoMirror) name - PDF name title - PDF title mass - mumugamma invariant mass (GeV), observable phos - photon energy scale (%), parameter phor - photon energy resolution (%), paramter data - (mmMass, mmgMass, phoERes = 100*(phoEreco/phoEgen - 1), dataset on which the shapes of reference PDFs are trained. phostarget - target reference value of the photon energy scale at which the model is being trained phortargetss - a list of target photon energy resolution values for the moment morphing rho - passed to trained RooKeysPdfs mirror - passed to trained RooKeysPdfs ''' ## Attach args. self._name = name self._title = title self._mass = mass self._phos = phos self._phor = phor self._data = data self._phostarget = phostarget self._phortargets = phortargets[:] self._rho = rho self._mirror = mirror ## Attach other attributes. self._massrange = (mass.getMin(), mass.getMax()) self._sdata_list = [] self._phostrue_list = [] self._phortrue_list = [] self._dm_dphos_list = [] self._msubs_list = [] self._keys_pdfs = [] self._keys_modes = [] self._keys_effsigmas = [] self._keys_fitresults = [] self._pdfs = [] self._custs = [] # self._pdfrefs = [] self._mrefs = [] self._phormorphs = [] self._phorhists = [] self._workspace = workspace ## self._workspace = ROOT.RooWorkspace(name + '_workspace', ## title + ' workspace') w = self._workspace self.w = w ## Import important args in workspace. # w.Import(ROOT.RooArgSet(mass, phos, phor)) w.Import(mass) w.Import(phos) w.Import(phor) w.Import(self._data) w.factory('ConstVar::{name}_phostarget({value})'.format( name=name, value=self._phostarget)) ## Define the morphing parameter. This an identity with the ## photon resolution for now. mpar = self._mpar = w.factory( 'expr::{name}_mpar("{phor}", {{{phor}}})'.format( ## 'expr::{name}_mpar("2 + sqrt(0.5^2 + 0.05 * {phor}^2)", {{{phor}}})'.format( ## 'expr::{name}_mpar("2.325+sqrt(0.4571 + (0.1608*{phor})^2)", {{{phor}}})'.format( name=name, phor=phor.GetName())) ## Define the formula for dlog(m)/dphos. self._dm_dphos_func = w.factory(''' expr::dm_dphos_func("0.5 * (1 - mmMass^2 / mmgMass^2) * mmgMass", {mmMass, mmgMass}) ''') ## Get the calibrator. self._calibrator = MonteCarloCalibrator(self._data) ## Loop over target reference photon energy resolutions in phortargets. for index, phortarget in enumerate(self._phortargets): ## Store the target photon resolution value. w.factory('ConstVar::{name}_phortarget_{index}({value})'.format( name=name, index=index, value=phortarget)) ## Get the corresponding smeared RooDataSet sdata named ## {name}_sdata_{index} and attach it to self._sdata sdata = self._calibrator.get_smeared_data( self._phostarget, phortarget, name + '_sdata_%d' % index, title + ' sdata %d' % index, ## Get the true scale and resolution with errors. (This can be ## added to the calibrator and snapshots of ## self._calibrator.s and self._calibrator.r stored as ## {name}_sdata_{index}_sr in self._calibrator.w) dofit=True) self._sdata_list.append(sdata) w.Import(sdata) phostrue = ROOT.RooRealVar(self._calibrator.s, name + '_phostrue_%d' % index) phortrue = ROOT.RooRealVar(self._calibrator.r, name + '_phortrue_%d' % index) phostrue.setConstant(True) phortrue.setConstant(True) self._phostrue_list.append(phostrue) self._phortrue_list.append(phortrue) w.Import(phostrue) w.Import(phortrue) ## Calculate the dlogm/dphos {name}_dm_dphos_{index} ## for the smeared dataset. sdata.addColumn(self._dm_dphos_func) dm_dphos = w.factory(''' {name}_dm_dphos_{index}[{mean}, 0, 1] '''.format(name=name, index=index, mean=sdata.mean(sdata.get()['dm_dphos_func']))) dm_dphos.setConstant(True) self._dm_dphos_list.append(dm_dphos) ## Define the mass scaling {name}_msubs{i} introducing ## the dependence on phos. This needs self._calibrator.s and ## dm_dphos. ## msubs = w.factory( ## ''' ## LinearVar::{msubs}( ## {mass}, 1, ## expr::{offset}( ## "- 0.01 * {dm_dphos} * ({phos} - {phostrue})", ## {{ {dm_dphos}, {phos}, {phostrue} }} ## ) ## ) ## '''.format(msubs = name + '_msubs_%d' % index, ## offset = name + '_msubs_offset_%d' % index, ## mass = self._mass.GetName(), ## dm_dphos = dm_dphos.GetName(), ## phos = self._phos.GetName(), ## phostrue = phostrue.GetName()) ## ) ## LinearVar cannot be persisted. msubs = w.factory(''' expr::{msubs}( "{mass} - 0.01 * {dm_dphos} * ({phos} - {phostrue})", {{ {mass}, {dm_dphos}, {phos}, {phostrue} }} ) '''.format(msubs=name + '_msubs_%d' % index, mass=self._mass.GetName(), dm_dphos=dm_dphos.GetName(), phos=self._phos.GetName(), phostrue=phostrue.GetName())) self._msubs_list.append(msubs) ## Build the corresponding parametrized KEYS PDF {name}_kyes_{index} ## with {name}_keys_mode_{index} and ## {name}_keys_effsigma_{index}. keys_mode = w.factory( '{name}_keys_mode_{index}[91.2, 60, 120]'.format(name=name, index=index)) keys_effsigma = w.factory( '{name}_keys_effsigma_{index}[3, 0.1, 60]'.format(name=name, index=index)) mass.setRange(*mrangetrain) keys_pdf = ParametrizedKeysPdf(name + '_keys_pdf_%d' % index, name + '_keys_pdf_%d' % index, mass, keys_mode, keys_effsigma, sdata, rho=self._rho) self._keys_modes.append(keys_mode) self._keys_effsigmas.append(keys_effsigma) self._keys_pdfs.append(keys_pdf) ## Fit the KEYS PDF to the training data and save the result ## {name}_keys_fitresult_{index} and parameter snapshots ## {name}_keys_mctrue_{index}. mass.setRange(*mrangenorm) keys_fitresult = keys_pdf.fitTo(sdata, roo.Range(*mrangefit), roo.Strategy(2), roo.NumCPU(8), roo.Save(True)) self._keys_fitresults.append(keys_fitresult) w.Import(keys_fitresult, name + '_keys_fitresult_%d' % index) w.saveSnapshot( name + '_mctrue_%d' % index, ','.join([ phostrue.GetName(), phortrue.GetName(), keys_mode.GetName(), keys_effsigma.GetName() ])) ## Sample the fitted KEYS PDF to a histogram {name}_hist_{index}. mass.setRange(*mrangetrain) hist = keys_pdf.createHistogram(name + '_hist_%d' % index, mass, roo.Binning('cache')) ## Build a RooDataHist {name}_dhist{index} of the sampled histogram. dhist = ROOT.RooDataHist(name + '_dhist_%d' % index, name + '_dhist_%d' % index, ROOT.RooArgList(mass), hist) w.Import(dhist) ## Build a RooHistPdf {name}_pdf_{index} using the dhist and msubs. ## pdf = w.factory( pdf = w.factory('HistPdf::{name}({{{mass}}}, {dhist}, 1)'.format( name=name + '_pdf_%d' % index, msubs=msubs.GetName(), mass=mass.GetName(), dhist=dhist.GetName())) self._pdfs.append(pdf) mass.setRange(*self._massrange) ## Calculate morphing parameter reference values float mref[index]. phorval = phor.getVal() phor.setVal(phortrue.getVal()) self._mrefs.append(mpar.getVal()) phor.setVal(phorval) ## End of loop over target phortargets ## Make the reference and cache binnings in phor self._check_phor_ranges() partitions = self._partition_binning(self._phor, 'cache', 'reference') ## Loop over phor reference bins and define pairwise RooMomentMorphs. for ilo in range(len(self._mrefs) - 1): ihi = ilo + 1 mlo = self._mrefs[ilo] mhi = self._mrefs[ihi] pdflo = self._pdfs[ilo] pdfhi = self._pdfs[ihi] phormorph = w.factory(''' MomentMorph::{name}_phormorph_{ilo}to{ihi}( {mpar}, {{{mass}}}, {{{pdfs}}}, {{{mrefs}}} ) '''.format(name=name, ilo=ilo, ihi=ihi, mpar=mpar.GetName(), mass=mass.GetName(), pdfs='%s, %s' % (pdflo.GetName(), pdfhi.GetName()), mrefs='%f, %f' % (mlo, mhi))) self._phormorphs.append(phormorph) ## Sample the morph in a 2D histogram in mass and phor. phorhist = phormorph.createHistogram( name + '_phorhist_%dto%d' % (ilo, ihi), mass, roo.Binning('cache'), roo.YVar(phor, roo.Binning(partitions[ilo]))) self._phorhists.append(phorhist) ## End of loop over phor reference bins. self._stitch_phorhists() self._phor_dhist = phor_dhist = ROOT.RooDataHist( name + '_phor_dhist', name + '_phor_dhist', ROOT.RooArgList(mass, phor), self._phorhist) average_index = (len(self._msubs_list) + 1) / 2 msubs = self._msubs_list[average_index] ## self._model = model = ROOT.RooHistPdf( ## name + '_phor_histpdf', name + '_phor_histpdf', ## ROOT.RooArgList(msubs, phor), ROOT.RooArgList(mass, phor), phor_dhist, 2 ## ) ## self._model = model = ROOT.RooPhosphorPdf( ## name + '_phor_histpdf', name + '_phor_histpdf', mass, msubs, phor, phor_dhist, 2 ## ) ## ## Quick hack to make things work. ## self._customizer = customizer = ROOT.RooCustomizer(model, 'msub') ## customizer.replaceArg(mass, msubs) ## model = customizer.build() # ROOT.RooHistPdf.__init__(self, model) ROOT.RooPhosphorPdf.__init__(self, name, title, mass, msubs, phos, phor, phor_dhist, 2) self.SetName(name) self.SetTitle(title)
width = w.factory('%s_effsigma[3, 0.1, 20]' % pdfname) pdf = ParametrizedKeysPdf(pdfname + '_pkeys', pdfname + '_pkyes', mmgMass, peak, width, sdata, ROOT.RooKeysPdf.NoMirror, 1.5) savrange = (mmgMass.getMin(), mmgMass.getMax()) normrange = (40, 130) fitrange = (60, 120) mmgMass.setRange(*fitrange) peak.setVal(pdf.shapemode) width.setVal(pdf.shapewidth) pdf.fitTo(sdata, roo.Range(*fitrange), roo.Strategy(2)) w.Import(pdf) ## peak.setConstant() ## width.setConstant() hist = pdf.createHistogram(pdfname + '_hist', mmgMass, roo.Binning(1000)) dhist = ROOT.RooDataHist(pdfname + '_dhist', pdfname + '_hist', ROOT.RooArgList(mmgMass), hist) w.Import(dhist) hpdf = w.factory( 'HistPdf::{name}({{mmgMass}}, {name}_dhist, 1)'.format(name=pdfname)) ## bdata = data.reduce(ROOT.RooArgSet(mmgMass)) ## bdata = bdata.binnedClone(data.GetName() + '_binned', data.GetTitle()) ## pdf = ROOT.RooHistPdf(pdfname, pdfname, ROOT.RooArgSet(mmgMass), bdata, 2) pdf.Print() # w.Import(pdf) rpdflist.append(pdfname) ## Store the target parameters in the workspaces phoScaleTarget.setVal(starget) phoResTarget.setVal(rtarget) w.saveSnapshot(pdfname, params, True)
mode4 = w.factory('mode4[91,60,120]') mode8 = w.factory('mode8[91,60,120]') seff4 = w.factory('seff4[4,0.1,50]') seff8 = w.factory('seff8[4,0.1,50]') pdf4 = ParametrizedKeysPdf('pdf4', 'pdf4', mmgMass, mode4, seff4, sdata4, mirror, 1.5) pdf8 = ParametrizedKeysPdf('pdf8', 'pdf8', mmgMass, mode8, seff8, sdata8, mirror, 1.5) mmgMass.setRange(50, 130) pdf4.fitTo(sdata4, roo.Range(60, 120)) h4 = pdf4.createHistogram('h4', mmgMass, roo.Binning(1000)) pdf8.fitTo(sdata8, roo.Range(60, 120)) h8 = pdf8.createHistogram('h8', mmgMass, roo.Binning(1000)) d4 = ROOT.RooDataHist('d4', 'd4', ROOT.RooArgList(mmgMass), h4) d8 = ROOT.RooDataHist('d8', 'd8', ROOT.RooArgList(mmgMass), h8) f4 = ROOT.RooHistPdf('f4', 'f4', ROOT.RooArgSet(mmgMass), d4, 1) f8 = ROOT.RooHistPdf('f8', 'f8', ROOT.RooArgSet(mmgMass), d8, 1) w.Import(f4) w.Import(f8) fm = w.factory('MomentMorph::fm(phoRes, {mmgMass}, {f4, f8}, {4, 6})')