utils_v2.Chi2Test Class Reference

Inheritance diagram for utils_v2.Chi2Test:

Public Member Functions
def	do_test (self, h1, h2)
def	enough_filled_bins (self, h, bin_count, more_than=3)
def	make_absolute (self, h, bin_count)
Public Member Functions inherited from utils_v2.StatisticalTest
def	do_test (self, h1, h2)
def	get_N_bins (self, h)
def	is_empty (self, h)

Static Public Attributes
	name
Static Public Attributes inherited from utils_v2.StatisticalTest
	name

Detailed Description

Definition at line 345 of file utils_v2.py.

Member Function Documentation

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

Definition at line 365 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')

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

Definition at line 356 of file utils_v2.py.

Referenced by utils_v2.Chi2Test.do_test().

    def enough_filled_bins(self, h, bin_count, more_than=3):
        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 348 of file utils_v2.py.

Referenced by utils_v2.Chi2Test.do_test().

    def make_absolute(self, h, bin_count):
        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)

Member Data Documentation

utils_v2.Chi2Test.name

static

Definition at line 346 of file utils_v2.py.

Referenced by config.CFG.__str__(), validation.Sample.digest(), VIDSelectorBase.VIDSelectorBase.initialize(), and Vispa.Views.PropertyView.Property.valueChanged().