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CutFlightBackground.py
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CutFlightBackground.py
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#!/usr/bin/env python
import sys
import os.path
import ROOT
from ROOT import TFile, TTree, TChain, TH1, TH2, TH3, TH1F, TH2F, TH3F, TGraph, TGraphErrors, TCanvas, TF1, TF2
import numpy as np
import commands
import click
from array import array
import math
from math import cos, sin, tan, acos, asin, atan, radians, degrees, log, log10, sqrt
ROOT.gROOT.SetBatch()
def find_first_nonzero(graph, backward=True, stat_factor=2.):
d1, d2 = ROOT.Double(0), ROOT.Double(0) #ROOT.Double
e2 = 0.
for ip in range(graph.GetN()):
jp = ip if backward is False else graph.GetN()-ip-1
graph.GetPoint(jp, d1, d2 )
e1 = graph.GetErrorX(jp)
e2 = graph.GetErrorY(jp)
if d2-e2*stat_factor>0 and d1-e1>0:
return (jp, d1)
def fit_pol1(graph, func, acc_min, acc_max):
graph.Fit(func, "Q", "", acc_min, acc_max)
return func.GetParameter(0), func.GetParameter(1)
def find_point_rbkg(graph, bkg_floor, acc_bkg_floor, rbkg):
d1, d2 = ROOT.Double(0), ROOT.Double(0)
npoint_threshold = None
npoint_threshold_error = None
for ip in range(graph.GetN()):
graph.GetPoint(ip, d1, d2)
e2 = graph.GetErrorY(ip)
#print "{0} +/- {1}".format(d2, e2)
if (d2-e2)<=bkg_floor*rbkg/d1*acc_bkg_floor:#*d1/acc_bkg_floor:
npoint_threshold_error = ip
break
for jp in range(ip, graph.GetN()):
graph.GetPoint(jp, d1, d2)
if d2<=bkg_floor*rbkg/d1*acc_bkg_floor:#*d1/acc_bkg_floor:
npoint_threshold = jp
break
#print npoint_threshold_error, npoint_threshold
return (npoint_threshold, npoint_threshold_error)
@click.command()
@click.argument('flightroc', type=str)
@click.option('--outpath', '-o', default=None)
def main(flightroc, outpath):
# Input
file_roc = TFile(flightroc, "READ")
hist_covered = file_roc.Get("hist_covered")
NSTEP = 1000
list_rbkg = [1., 10.]
if outpath is None:
outpath = flightroc.replace("ROC", "CUT")
file_out = TFile(outpath, "RECREATE")
file_out.cd()
dict_hist_out = {}
for rbkg in list_rbkg:
dict_hist_out[rbkg] = hist_covered.Clone("hist_bdt_cut_R{0:0>3.0f}".format(rbkg*10))
dict_hist_out[rbkg].SetTitle("Flight data BDT cut R{0:0>3.0f}".format(rbkg*10))
for iloge in range(1, 1+hist_covered.GetXaxis().GetNbins()):
for jcth in range(1, 1+hist_covered.GetYaxis().GetNbins()):
str_region = "E{e}_Z{c}".format(e=iloge, c=jcth)
if hist_covered.GetBinContent(iloge, jcth)>0:
print "*", str_region
dir_roc = file_roc.Get(str_region)
graph_evtdens = dir_roc.Get("graph_evtdens_{0}".format(str_region))
hist_acc = dir_roc.Get("sig_acc_cth_cut_{0}".format(str_region))
iacc_min_nonzero, acc_min_nonzero = find_first_nonzero(graph_evtdens, True)
print "First non-zero acceptance (Point No. {1}): {0:1.2E}".format(acc_min_nonzero, iacc_min_nonzero)#-graph_evtdens.GetErrorX(iacc_min_nonzero))
acc0, bkg0 = ROOT.Double(0), ROOT.Double(0) #ROOT.Double
graph_evtdens.GetPoint(0, acc0, bkg0)
can = TCanvas("can_{0}".format(str_region), graph_evtdens.GetTitle())
p0, p1 = 0., 0.
p0_prev, p1_prev = 0., 0.
acc, acc_prev = 0., 0.
fpol1 = TF1("fpol1", "[0]*1E-5+[1]*x", 0, acc0)
fpol1.SetParameter(0, 3)
fpol1.SetParameter(1, 0.)
for jacc in range(NSTEP):
acc = acc0/2.*float(NSTEP-jacc)/NSTEP
fit_pol1(graph_evtdens, fpol1, acc_min_nonzero-graph_evtdens.GetErrorX(iacc_min_nonzero), acc)
p0 = (fpol1.Eval(acc_min_nonzero) + fpol1.Eval(acc))/2.
p1 = fpol1.GetParameter(1) #fit_pol1(graph_evtdens, fpol1, acc_min_nonzero, acc)
e1 = fpol1.GetParError(1)
#pmin = fpol1.Eval(acc_min_nonzero)
#pmax = fpol1.Eval(acc)
if acc<=acc_min_nonzero:
break
elif abs(p1)<e1:#0:
break
else:
p0_prev, p1_prev = p0, p1
acc_prev = acc
print acc_prev, p0_prev, p1_prev
print acc, p0, p1
bkg_floor = p0#_prev
acc_bkg_floor = acc#_prev
print "Background floor: {0:1.2E} (Acceptance: {1:1.2E})".format(bkg_floor, acc_bkg_floor)
can.cd()
graph_evtdens.Draw("APL")
graph_evtdens.GetXaxis().SetRangeUser(0, acc0*0.8)
graph_evtdens.GetYaxis().SetRangeUser(bkg_floor*0.1, bkg_floor*100)
can.SetLogy()
can.Write()
for rbkg in list_rbkg:
print "{0}x BKG floor".format(rbkg)
np_cut, np_cut_error = find_point_rbkg(graph_evtdens, bkg_floor=bkg_floor, acc_bkg_floor=acc_bkg_floor, rbkg=rbkg)
cut_bdt = hist_acc.GetXaxis().GetBinLowEdge(np_cut)
cut_bdt_err = cut_bdt - hist_acc.GetXaxis().GetBinLowEdge(np_cut_error)
d1, d2 = ROOT.Double(0), ROOT.Double(0) #ROOT.Double
graph_evtdens.GetPoint( np_cut, d1, d2 )
print " BDT cut: {0:1.2E} +/- {1:1.2E} (Acceptance: {2:1.2E}; Background: {3:1.2E})".format(cut_bdt, cut_bdt_err, hist_acc.GetBinContent(np_cut), d2)
dict_hist_out[rbkg].SetBinContent(iloge, jcth, cut_bdt)
dict_hist_out[rbkg].SetBinError(iloge, jcth, cut_bdt_err)
print ""
dict_func_cut = {}
dict_func_cut['pol0'] = TF2("pol0", "[0]", 4.35, 5.75, 0.0, 1.0)
dict_func_cut['pol1'] = TF2("pol1", "[0]+[1]*x+[2]*y", 4.35, 5.75, 0.0, 1.0)
dict_func_cut['pol2'] = TF2("pol2", "[0]+[1]*x+[2]*y+[3]*x*x+[4]*x*y+[5]*y*y", 4.35, 5.75, 0.0, 1.0)
for rbkg in list_rbkg:
dict_hist_out[rbkg].Fit()
dict_hist_out[rbkg].Write()
if __name__ == '__main__':
main()