utils_v2.Chi2Test Class Reference

Inheritance diagram for utils_v2.Chi2Test:

Public Member Functions
def	do_test
def	enough_filled_bins
def	make_absolute
Public Member Functions inherited from utils_v2.StatisticalTest
def	do_test
def	get_N_bins
def	is_empty

Static Public Attributes
string	name = 'Chi2'
Static Public Attributes inherited from utils_v2.StatisticalTest
	name = None

Detailed Description

Definition at line 347 of file utils_v2.py.

Member Function Documentation

def utils_v2.Chi2Test.do_test	(		self,
			h1,
			h2
	)

Definition at line 367 of file utils_v2.py.

References utils_v2.Chi2Test.enough_filled_bins(), utils_v2.StatisticalTest.get_N_bins(), and utils_v2.Chi2Test.make_absolute().

    def do_test(self, h1, h2):
        p_value = super(Chi2Test, self).do_test(h1, h2)
        if p_value is not None:
            return p_value

        bin_count = self.get_N_bins(h1)

        # Make histograms absolute.
        self.make_absolute(h1, bin_count)
        self.make_absolute(h2, bin_count)

        # Check if there is enough filled bins in bouth histograms.
        if not self.enough_filled_bins(h1, bin_count) or\
           not self.enough_filled_bins(h2, bin_count):
            return 1

        if h1.InheritsFrom("TProfile") or (h1.GetEntries() != h1.GetSumOfWeights()):
            return h1.Chi2Test(h2, 'WW')
        return h1.Chi2Test(h2, 'UU')