rf504_simwstool

Organization and simultaneous fits: using RooSimWSTool to construct a simultaneous pdf that is built of variations of an input pdf

Author: Clemens Lange, Wouter Verkerke (C++ version)
This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Sunday, November 27, 2022 at 11:07 AM.

In [1]:
import ROOT
Welcome to JupyROOT 6.27/01

Create master pdf

Construct gauss(x,m,s)

In [2]:
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)
[#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.

Construct poly(x,p0)

In [3]:
p0 = ROOT.RooRealVar("p0", "p0", 0.01, 0.0, 1.0)
poly = ROOT.RooPolynomial("p", "p", x, [p0])

model = fgauss(x) + (1-f)poly(x)

In [4]:
f = ROOT.RooRealVar("f", "f", 0.5, 0.0, 1.0)
model = ROOT.RooAddPdf("model", "model", [gauss, poly], [f])

Create category observables for splitting

Define two categories that can be used for splitting

In [5]:
c = ROOT.RooCategory("c", "c")
c.defineType("run1")
c.defineType("run2")

d = ROOT.RooCategory("d", "d")
d.defineType("foo")
d.defineType("bar")
Out[5]:
False

Set up SimWSTool

Import ingredients in a workspace

In [6]:
w = ROOT.RooWorkspace("w", "w")
w.Import({model, c, d})
Out[6]:
False
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooAddPdf::model
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooGaussian::g
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::x
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::m
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::s
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::f
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooPolynomial::p
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::p0
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooCategory::d
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooCategory::c

Make Sim builder tool

In [7]:
sct = ROOT.RooSimWSTool(w)

Build a simultaneous model with one split

Construct a simultaneous pdf with the following form

model_run1(x) = fgauss_run1(x,m_run1,s) + (1-f)poly model_run2(x) = fgauss_run2(x,m_run2,s) + (1-f)poly simpdf(x,c) = model_run1(x) if c=="run1" = model_run2(x) if c=="run2"

Returned pdf is owned by the workspace

In [8]:
model_sim = sct.build("model_sim", "model", SplitParam=("m", "c"))
Splitrule for p.d.f model with state list 
 parameter m is split with constraint in categories (c)
[#1] INFO:ObjectHandling -- RooSimWSTool::executeBuild: list of prototype pdfs (model)
[#1] INFO:ObjectHandling -- RooSimWSTool::executeBuild: list of splitting categories (c)
[#1] INFO:ObjectHandling -- RooSimPdfBuilder::executeBuild: processing prototype pdf model
[#1] INFO:ObjectHandling -- RooSimWSTool::executeBuild: configured customizers for all prototype pdfs
[#1] INFO:ObjectHandling -- RooSimWSTool::executeBuild: Customizing prototype pdf model for mode run1
[#1] INFO:ObjectHandling -- RooSimWSTool::executeBuild: Customizing prototype pdf model for mode run2
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooSimultaneous::model_sim
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooAddPdf::model_run1
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooGaussian::g_run1
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::m_run1
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooAddPdf::model_run2
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooGaussian::g_run2
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::m_run2

Print tree structure of model

In [9]:
model_sim.Print("t")
0xa1cbd90 RooSimultaneous::model_sim = 1 [Auto,Dirty] 
  0x9f13bc0/V- RooAddPdf::model_run1 = 1/1 [Auto,Clean] 
    0x9f21b50/V- RooGaussian::g_run1 = 1 [Auto,Dirty] 
      0xa1c78b0/V- RooRealVar::m_run1 = 0
      0x9dcf930/V- RooRealVar::x = 0
      0x3939890/V- RooRealVar::s = 1
    0x71d1720/V- RooRealVar::f = 0.5
    0x9d6f380/V- RooPolynomial::p = 1 [Auto,Dirty] 
      0x9dcf930/V- RooRealVar::x = 0
      0x393cc10/V- RooRealVar::p0 = 0.01
  0x98ea8a0/V- RooAddPdf::model_run2 = 1/1 [Auto,Clean] 
    0xa1dabc0/V- RooGaussian::g_run2 = 1 [Auto,Dirty] 
      0x9e94460/V- RooRealVar::m_run2 = 0
      0x9dcf930/V- RooRealVar::x = 0
      0x3939890/V- RooRealVar::s = 1
    0x71d1720/V- RooRealVar::f = 0.5
    0x9d6f380/V- RooPolynomial::p = 1 [Auto,Dirty] 
      0x9dcf930/V- RooRealVar::x = 0
      0x393cc10/V- RooRealVar::p0 = 0.01
  0x9495c60/V- RooCategory::c = run2(idx = 1)

Adjust model_sim parameters in workspace

In [10]:
w.var("m_run1").setVal(-3)
w.var("m_run2").setVal(+3)

Print contents of workspace

In [11]:
w.Print("v")
RooWorkspace(w) w contents

variables
---------
(c,d,f,m,m_run1,m_run2,p0,s,x)

p.d.f.s
-------
RooGaussian::g[ x=x mean=m sigma=s ] = 1
RooGaussian::g_run1[ x=x mean=m_run1 sigma=s ] = 0.011109
RooGaussian::g_run2[ x=x mean=m_run2 sigma=s ] = 0.011109
RooAddPdf::model[ f * g + [%] * p ] = 1/1
RooAddPdf::model_run1[ f * g_run1 + [%] * p ] = 0.505554/1
RooAddPdf::model_run2[ f * g_run2 + [%] * p ] = 0.505554/1
RooSimultaneous::model_sim[ indexCat=c run1=model_run1 run2=model_run2 ] = 0.505554
RooPolynomial::p[ x=x coefList=(p0) ] = 1

Build a simultaneous model with product split

Build another simultaneous pdf using a composite split in states c X d

In [12]:
model_sim2 = sct.build("model_sim2", "model", SplitParam=("p0", "c,d"))
Splitrule for p.d.f model with state list 
 parameter p0 is split with constraint in categories (c,d)
[#1] INFO:ObjectHandling -- RooSimWSTool::executeBuild: list of prototype pdfs (model)
[#1] INFO:ObjectHandling -- RooSimWSTool::executeBuild: list of splitting categories (c,d)
[#1] INFO:ObjectHandling -- RooSimPdfBuilder::executeBuild: processing prototype pdf model
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooMultiCategory::c,d
[#1] INFO:ObjectHandling -- RooSimWSTool::executeBuild: configured customizers for all prototype pdfs
[#1] INFO:ObjectHandling -- RooSimWSTool::executeBuild: Customizing prototype pdf model for mode {run1;foo}
[#1] INFO:ObjectHandling -- RooSimWSTool::executeBuild: Customizing prototype pdf model for mode {run2;foo}
[#1] INFO:ObjectHandling -- RooSimWSTool::executeBuild: Customizing prototype pdf model for mode {run1;bar}
[#1] INFO:ObjectHandling -- RooSimWSTool::executeBuild: Customizing prototype pdf model for mode {run2;bar}
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooSimultaneous::model_sim2
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooSuperCategory::model_sim2_index
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooMultiCategory::model_sim2_index_internalMultiCat
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooAddPdf::model_{run1;foo}
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooPolynomial::p_{run1;foo}
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::p0_{run1;foo}
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooAddPdf::model_{run2;foo}
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooPolynomial::p_{run2;foo}
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::p0_{run2;foo}
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooAddPdf::model_{run1;bar}
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooPolynomial::p_{run1;bar}
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::p0_{run1;bar}
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooAddPdf::model_{run2;bar}
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooPolynomial::p_{run2;bar}
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::p0_{run2;bar}

Print tree structure of self model

In [13]:
model_sim2.Print("t")
0x9fccb50 RooSimultaneous::model_sim2 = 1 [Auto,Dirty] 
  0x4177920/V- RooSuperCategory::model_sim2_index = {run2;bar}(idx = 3)
 [Auto,Clean] 
    0x9fb8860/VS RooMultiCategory::model_sim2_index_internalMultiCat = {run2;bar}(idx = 3)
 [Auto,Clean] 
      0x9495c60/VS RooCategory::c = run2(idx = 1)

      0x9c214b0/VS RooCategory::d = bar(idx = 1)

  0xa0a6080/V- RooAddPdf::model_{run1;foo} = 1/1 [Auto,Clean] 
    0x9fa9870/V- RooPolynomial::p_{run1;foo} = 1 [Auto,Dirty] 
      0x9fd5d60/V- RooRealVar::p0_{run1;foo} = 0.01
      0x9dcf930/V- RooRealVar::x = 0
    0x850abf0/V- RooGaussian::g = 1 [Auto,Dirty] 
      0x9dcf930/V- RooRealVar::x = 0
      0x9c24140/V- RooRealVar::m = 0
      0x3939890/V- RooRealVar::s = 1
    0x71d1720/V- RooRealVar::f = 0.5
  0xa0a5110/V- RooAddPdf::model_{run2;foo} = 1/1 [Auto,Clean] 
    0x9fabbc0/V- RooPolynomial::p_{run2;foo} = 1 [Auto,Dirty] 
      0xa058e80/V- RooRealVar::p0_{run2;foo} = 0.01
      0x9dcf930/V- RooRealVar::x = 0
    0x850abf0/V- RooGaussian::g = 1 [Auto,Dirty] 
      0x9dcf930/V- RooRealVar::x = 0
      0x9c24140/V- RooRealVar::m = 0
      0x3939890/V- RooRealVar::s = 1
    0x71d1720/V- RooRealVar::f = 0.5
  0xa0a0630/V- RooAddPdf::model_{run1;bar} = 1/1 [Auto,Clean] 
    0x9fac760/V- RooPolynomial::p_{run1;bar} = 1 [Auto,Dirty] 
      0x9fe4f90/V- RooRealVar::p0_{run1;bar} = 0.01
      0x9dcf930/V- RooRealVar::x = 0
    0x850abf0/V- RooGaussian::g = 1 [Auto,Dirty] 
      0x9dcf930/V- RooRealVar::x = 0
      0x9c24140/V- RooRealVar::m = 0
      0x3939890/V- RooRealVar::s = 1
    0x71d1720/V- RooRealVar::f = 0.5
  0x9fe0180/V- RooAddPdf::model_{run2;bar} = 1/1 [Auto,Clean] 
    0xa0b0de0/V- RooPolynomial::p_{run2;bar} = 1 [Auto,Dirty] 
      0x9ad7a10/V- RooRealVar::p0_{run2;bar} = 0.01
      0x9dcf930/V- RooRealVar::x = 0
    0x850abf0/V- RooGaussian::g = 1 [Auto,Dirty] 
      0x9dcf930/V- RooRealVar::x = 0
      0x9c24140/V- RooRealVar::m = 0
      0x3939890/V- RooRealVar::s = 1
    0x71d1720/V- RooRealVar::f = 0.5