def testLinearOddSamples(self):
"""Tests the correct computation of sample standard deviation for a straight line with an odd number of samples."""
expected = numpy.resize(1.0,self.data.shape)
stdRand = numpy.sqrt((2.0*(1.0-2.0/3)**2+4.0/9.0)*0.5)
expected[0] = stdRand
expected[-1]= stdRand
result = OE.localNoise(self.data,samples=3)
numpy.testing.assert_array_almost_equal(expected,result,err_msg='Expected local noise is %s, but should be %s.' % (result,expected))
def testLinearEvenSamples(self):
"""Tests the correct computation of sample standard deviation for a straight line with an even set of samples.
"""
std = numpy.sqrt(5./3)
expected = numpy.resize(std,self.data.shape)
stdRand = numpy.sqrt(2./3)
expected[:2] = stdRand
expected[-1:]= stdRand
result = OE.localNoise(self.data,samples=4)
numpy.testing.assert_array_almost_equal(expected,result,err_msg='Expected local noise is %s, but should be %s.' % (result,expected))
def testLinearOddSamples(self):
"""Tests the correct computation of sample standard deviation for a straight line with an odd number of samples."""
expected = numpy.resize(1.0, self.data.shape)
stdRand = numpy.sqrt((2.0 * (1.0 - 2.0 / 3)**2 + 4.0 / 9.0) * 0.5)
expected[0] = stdRand
expected[-1] = stdRand
result = OE.localNoise(self.data, samples=3)
numpy.testing.assert_array_almost_equal(
expected,
result,
err_msg='Expected local noise is %s, but should be %s.' %
(result, expected))
def testLinearEvenSamples(self):
"""Tests the correct computation of sample standard deviation for a straight line with an even set of samples.
"""
std = numpy.sqrt(5. / 3)
expected = numpy.resize(std, self.data.shape)
stdRand = numpy.sqrt(2. / 3)
expected[:2] = stdRand
expected[-1:] = stdRand
result = OE.localNoise(self.data, samples=4)
numpy.testing.assert_array_almost_equal(
expected,
result,
err_msg='Expected local noise is %s, but should be %s.' %
(result, expected))
