def setUp(self):
f = File('test.root', 'recreate')
f.mkdir('TTbar_plus_X_analysis/EPlusJets/Ref selection', recurse=True)
f.cd('TTbar_plus_X_analysis/EPlusJets/Ref selection')
tree = create_test_tree()
h = create_test_hist()
h.write()
tree.write()
f.write()
f.Close()
def __return_histogram(self,
d_hist_info,
ignoreUnderflow=True,
useQCDControl=False,
useQCDSystematicControl=False):
'''
Takes basic histogram info and returns histo.
Maybe this can move to ROOT_utilities?
'''
from rootpy.io.file import File
from rootpy.plotting import Hist
from dps.utils.hist_utilities import fix_overflow
f = d_hist_info['input_file']
tree = d_hist_info['tree']
qcd_tree = d_hist_info["qcd_control_region"]
qcd_tree_for_normalisation = d_hist_info["qcd_normalisation_region"]
var = d_hist_info['branch']
bins = d_hist_info['bin_edges']
lumi_scale = d_hist_info['lumi_scale']
scale = d_hist_info['scale']
weights = d_hist_info['weight_branches']
selection = d_hist_info['selection']
if useQCDControl:
# replace SR tree with CR tree
if useQCDSystematicControl:
tree = qcd_tree_for_normalisation
else:
tree = qcd_tree
# Remove the Lepton reweighting for the datadriven qcd (SF not derived for unisolated leptons)
for weight in weights:
if 'Electron' in weight: weights.remove(weight)
elif 'Muon' in weight: weights.remove(weight)
weights = "*".join(weights)
# Selection will return a weight 0 or 1 depending on whether event passes selection
weights_and_selection = '( {0} ) * ( {1} )'.format(weights, selection)
scale *= lumi_scale
root_file = File(f)
root_tree = root_file.Get(tree)
root_histogram = Hist(bins)
# Draw histogram of var for selection into root_histogram
root_tree.Draw(var,
selection=weights_and_selection,
hist=root_histogram)
root_histogram.Scale(scale)
# When a tree is filled with a dummy variable, it will end up in the underflow, so ignore it
if ignoreUnderflow:
root_histogram.SetBinContent(0, 0)
root_histogram.SetBinError(0, 0)
# Fix overflow (Moves entries from overflow bin into last bin i.e. last bin not |..| but |--> )
root_histogram = fix_overflow(root_histogram)
root_file.Close()
return root_histogram
