some mathematical tools More...

Collaboration diagram for python.trfUtils.math:

Public Member Functions
	mean (self, data)
	sum_square_dev (self, data)
	sum_dev (self, x, y)
	chi2 (self, observed, expected)

Detailed Description

some mathematical tools

Definition at line 1460 of file trfUtils.py.

Member Function Documentation

◆ chi2()

python.trfUtils.math.chi2	(	self,
		observed,
		expected )

Definition at line 1483 of file trfUtils.py.

    def chi2(self, observed, expected):
        if 0 in expected:
            return 0.0
        return sum((_o - _e) ** 2 / _e for _o, _e in zip(observed, expected))
 
 

◆ mean()

python.trfUtils.math.mean	(		self,
			data )

Definition at line 1463 of file trfUtils.py.

    def mean(self, data):
        n = len(data)
        if n < 1:
            msg.warning('mean requires at least one data point')
        return sum(data)/n
 

◆ sum_dev()

python.trfUtils.math.sum_dev	(	self,
		x,
		y )

Definition at line 1477 of file trfUtils.py.

    def sum_dev(self, x, y):
        c1 = self.mean(x)
        c2 = self.mean(y)
        return sum((_x - c1) * (_y - c2) for _x, _y in zip(x, y))
 

◆ sum_square_dev()

python.trfUtils.math.sum_square_dev	(		self,
			data )

Definition at line 1471 of file trfUtils.py.

    def sum_square_dev(self, data):
        c = self.mean(data)
        return sum((x - c) ** 2 for x in data)
 

The documentation for this class was generated from the following file: