class KeysResponseFitter:
#__________________________________________________________________________
def __init__(self, data, rho=1.5, printlevel=-1, option='monolithic'):
if data.get().getSize() != 1:
raise RuntimeError, 'Data must contain just one variable!'
self.w = ROOT.RooWorkspace('KeysResponseFitter',
'KeysResponseFitter Workspace')
self.w.Import(data)
self.data = self.w.data(data.GetName())
self.data.SetName('data')
self.x = self.w.var(data.get().first().GetName())
self.x.SetName('x')
self.rho = rho
self.printlevel = printlevel
## Define mode and effsigma.
self.mode = self.w.factory('mode[0, -50, 50]')
self.effsigma = self.w.factory('effsigma[1, 0.01, 50]')
for x in 'mode effsigma'.split():
getattr(self, x).setUnit(self.x.getUnit())
self.option = option
if option == 'monolithic':
self.model = ParameterizedKeysPdf('model', 'model', self.x,
self.mode,
self.effsigma, self.data, rho=rho,
forcerange=True)
elif 'split' in option:
self.initsplit()
else:
raise RuntimeError, 'Unknown option: %s' % option
# self.dofit()
## end of __init__
#__________________________________________________________________________
def initsplit(self):
'''
Splits the dataset in two and builds a model for each half.
'''
global arg
self.resampler = Resampler(self.data)
self.subdata = []
self.submodel = []
if not self.option.replace('split', ''):
self.nsplit = 2
else:
self.nsplit = int(self.option.replace('split', ''))
self.part = ROOT.RooCategory('part', 'part')
self.model = ROOT.RooSimultaneous('model', 'model', self.part)
for i in range(self.nsplit):
cat = str(i)
name = 'subdata%d' % i
self.part.defineType(cat)
self.subdata.append(self.resampler.prescale(self.nsplit, [i], name, name))
name = 'submodel%d' % i
self.submodel.append(
ParameterizedKeysPdf(
name, name, self.x, self.mode, self.effsigma,
self.subdata[i], rho=self.rho, forcerange=True
)
)
self.model.addPdf(self.submodel[i], cat)
# Now shuffle the subdata and the categories
args = [roo.Index(self.part)]
cats = [str(i) for i in range(self.nsplit)]
cats.reverse()
for cat, subdata in zip(cats, self.subdata):
args.append(roo.Import(cat, subdata))
self.data = ROOT.RooDataSet('data', 'data', ROOT.RooArgSet(self.x),
*args)
## end of initsplit()
#__________________________________________________________________________
def dofit(self):
self.model.fitTo(self.data, roo.PrintLevel(1), roo.Verbose(False))
## end of doFit
#__________________________________________________________________________
def makeplot(self):
self.canvas = canvases.next()
self.plot = self.x.frame()
self.data.plotOn(self.plot)
self.model.plotOn(self.plot)
self.model.paramOn(self.plot)
self.plot.Draw()
self.canvas.Update()
