utils_v2::Chi2Test Class Reference

Inheritance diagram for utils_v2::Chi2Test:

List of all members.

Public Member Functions
def	do_test
def	enough_filled_bins
def	make_absolute
Static Public Attributes
string	name = 'Chi2'

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Detailed Description

Definition at line 344 of file utils_v2.py.

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Member Function Documentation

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

Reimplemented from utils_v2::StatisticalTest.

Definition at line 364 of file utils_v2.py.

                             :
        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')

def utils_v2::Chi2Test::enough_filled_bins	(		self,
			h,
			bin_count,
			more_than = 3
	)

Definition at line 355 of file utils_v2.py.

                                                           :
        filled_bins = 0
        for i in xrange(1, bin_count):
            if h.GetBinContent(i) > 0:
                filled_bins += 1
            if filled_bins > more_than:
                return True
        return False

def utils_v2::Chi2Test::make_absolute	(		self,
			h,
			bin_count
	)

Definition at line 347 of file utils_v2.py.

                                         :
        for i in xrange(1, bin_count): # Why here is no +1?
            content = h.GetBinContent(i)
            if content < 0:
                h.SetBinContent(i, -1 * content)
            if h.GetBinError(i) == 0 and content != 0:
                h.SetBinContent(i, 0)

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Member Data Documentation

string utils_v2::Chi2Test::name = 'Chi2' [static]

Reimplemented from utils_v2::StatisticalTest.

Definition at line 345 of file utils_v2.py.