rf505_asciicfg.py File Reference

Detailed Description

Organization and simultaneous fits: reading and writing ASCII configuration files

 
import ROOT
 
 
# Create pdf
# ------------------
 
# Construct gauss(x,m,s)
x = ROOT.RooRealVar("x", "x", -10, 10)
m = ROOT.RooRealVar("m", "m", 0, -10, 10)
s = ROOT.RooRealVar("s", "s", 1, -10, 10)
gauss = ROOT.RooGaussian("g", "g", x, m, s)
 
# Construct poly(x,p0)
p0 = ROOT.RooRealVar("p0", "p0", 0.01, 0.0, 1.0)
poly = ROOT.RooPolynomial("p", "p", x, [p0])
 
# model = f*gauss(x) + (1-f)*poly(x)
f = ROOT.RooRealVar("f", "f", 0.5, 0.0, 1.0)
model = ROOT.RooAddPdf("model", "model", [gauss, poly], [f])
 
# Fit model to toy data
# -----------------------------------------
 
d = model.generate({x}, 1000)
model.fitTo(d, PrintLevel=-1)
 
# Write parameters to ASCII file
# -----------------------------------------------------------
 
# Obtain set of parameters
params = model.getParameters({x})
 
# Write parameters to file
params.writeToFile("rf505_asciicfg_example.txt")
 
# Read parameters from ASCII file
# ----------------------------------------------------------------
 
# Read parameters from file
params.readFromFile("rf505_asciicfg_example.txt")
params.Print("v")
 
configFile = ROOT.gROOT.GetTutorialDir().Data() + "/roofit/rf505_asciicfg.txt"
 
# Read parameters from section 'Section2' of file
params.readFromFile(configFile, "", "Section2")
params.Print("v")
 
# Read parameters from section 'Section3' of file. Mark all
# variables that were processed with the "READ" attribute
params.readFromFile(configFile, "READ", "Section3")
 
# Print the list of parameters that were not read from Section3
print("The following parameters of the were _not_ read from Section3: ", params.selectByAttrib("READ", False))
 
# Read parameters from section 'Section4' of file, contains
# 'include file' statement of rf505_asciicfg_example.txt
# so that we effective read the same
params.readFromFile(configFile, "", "Section4")
params.Print("v")

[#0] WARNING:InputArguments -- The parameter 's' with range [-10, 10] of the RooGaussian 'g' exceeds the safe range of (0, inf). Advise to limit its range.
[#1] INFO:Fitting -- RooAbsPdf::fitTo(model) fixing normalization set for coefficient determination to observables in data
[#1] INFO:Fitting -- using generic CPU library compiled with no vectorizations
[#1] INFO:Fitting -- Creation of NLL object took 976.497 μs
[#1] INFO:Fitting -- RooAddition::defaultErrorLevel(nll_model_modelData) Summation contains a RooNLLVar, using its error level
[#1] INFO:Minimization -- RooAbsMinimizerFcn::setOptimizeConst: activating const optimization
[#1] INFO:Minimization -- RooAbsMinimizerFcn::setOptimizeConst: deactivating const optimization
  1) 0x55e9a20356e0 RooRealVar::  f = 0.50733 +/- 0.020971  L(0 - 1)  "f"
  2) 0x55e9a1d25350 RooRealVar::  m = 0.0064018 +/- 0.053686  L(-10 - 10)  "m"
  3) 0x55e9a1f0ed00 RooRealVar:: p0 = 0.0073509 +/- 0.0078312  L(0 - 1)  "p0"
  4) 0x55e9a1d29920 RooRealVar::  s = 0.96516 +/- 0.047052  L(-10 - 10)  "s"
[#0] ERROR:InputArguments -- RooArgSet::readFromFile(parameters) error opening file /github/home/ROOT-CI/build/tutorials/roofit/rf505_asciicfg.txt
  1) 0x55e9a20356e0 RooRealVar::  f = 0.50733 +/- 0.020971  L(0 - 1)  "f"
  2) 0x55e9a1d25350 RooRealVar::  m = 0.0064018 +/- 0.053686  L(-10 - 10)  "m"
  3) 0x55e9a1f0ed00 RooRealVar:: p0 = 0.0073509 +/- 0.0078312  L(0 - 1)  "p0"
  4) 0x55e9a1d29920 RooRealVar::  s = 0.96516 +/- 0.047052  L(-10 - 10)  "s"
[#0] ERROR:InputArguments -- RooArgSet::readFromFile(parameters) error opening file /github/home/ROOT-CI/build/tutorials/roofit/rf505_asciicfg.txt
The following parameters of the were _not_ read from Section3:  { @0x55e9a2f3e620, @0x55e9a2f3e628, @0x55e9a2f3e630, @0x55e9a2f3e638 }
[#0] ERROR:InputArguments -- RooArgSet::readFromFile(parameters) error opening file /github/home/ROOT-CI/build/tutorials/roofit/rf505_asciicfg.txt
  1) 0x55e9a20356e0 RooRealVar::  f = 0.50733 +/- 0.020971  L(0 - 1)  "f"
  2) 0x55e9a1d25350 RooRealVar::  m = 0.0064018 +/- 0.053686  L(-10 - 10)  "m"
  3) 0x55e9a1f0ed00 RooRealVar:: p0 = 0.0073509 +/- 0.0078312  L(0 - 1)  "p0"
  4) 0x55e9a1d29920 RooRealVar::  s = 0.96516 +/- 0.047052  L(-10 - 10)  "s"

Date

February 2018

Authors

Clemens Lange, Wouter Verkerke (C++ version)

Definition in file rf505_asciicfg.py.