doc/v622/rf507__debugtools_8py.html

import ROOT


# Activate ROOT.RooFit memory tracing

ROOT.RooTrace.active(ROOT.kTRUE)


# 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)


# Show dump of all ROOT.RooFit object in memory

ROOT.RooTrace.dump()


# Activate verbose mode

ROOT.RooTrace.verbose(ROOT.kTRUE)


# Construct poly(x,p0)

p0 = ROOT.RooRealVar("p0", "p0", 0.01, 0., 1.)

poly = ROOT.RooPolynomial("p", "p", x, ROOT.RooArgList(p0))


# Put marker in trace list for future reference

ROOT.RooTrace.mark()


# model = f*gauss(x) + (1-f)*poly(x)

f = ROOT.RooRealVar("f", "f", 0.5, 0., 1.)

model = ROOT.RooAddPdf("model", "model", ROOT.RooArgList(

    gauss, poly), ROOT.RooArgList(f))


# Show object added to memory since marker

ROOT.RooTrace.printObjectCounts()


# Since verbose mode is still on, will see messages

# pertaining to destructor calls of all RooFit objects

# made in self macro

#

# A call to RooTrace.dump() at the end of self macro

# should show that there a no RooFit object left in memory