def test_shift_NoRedshift(self):
segment1 = Spectrum(x = numpy.arange(1000,10000,10),
y = numpy.arange(1000,10000,10),
z=1.0)
segment2 = Sed(x=numpy.arange(1000,10000,500),
y=numpy.arange(1000,10000,500))
segment3 = Sed(x=numpy.arange(1000,10000,500),
y=numpy.arange(1000,10000,500),
z = 0.35)
aggsed = Stack([segment1, segment2, segment3])
shift_aggsed = aggsed.shift(0.5)
self.assertEqual(len(shift_aggsed), 2)
self.assertAlmostEqual(shift_aggsed.x[0][1], 757.5)
self.assertAlmostEqual(shift_aggsed.x[1][1], 1666.6666667)
def test_shift(self):
segment1 = Spectrum(x = numpy.arange(1000,10000,10),
y = numpy.arange(1000,10000,10),
z = 1.0)
segment2 = Sed(x=numpy.arange(1000,10000,500),
y=numpy.arange(1000,10000,500),
z = 0.5)
segment3 = Sed(x=numpy.arange(1000,10000,500),
y=numpy.arange(1000,10000,500),
z = 0.35)
aggsed = Stack([segment1, segment2, segment3])
shift_aggsed = aggsed.shift(0.4)
self.assertEqual(shift_aggsed[0].z, shift_aggsed[1].z)
self.assertEqual(shift_aggsed[0].z, 0.4)
self.assertAlmostEqual(shift_aggsed.x[0][10], 770.0)
def test_norm_by_int_correct_flux(self):
segment1 = Spectrum(x=numpy.arange(1000,10000,10),
y=numpy.arange(1000,10000,10),
yerr=numpy.arange(1000,10000,10)*.01,
z=0.0)
segment2 = Sed(x=numpy.arange(1000,10000,500),
y=numpy.arange(1000,10000,500),
yerr=numpy.arange(1000,10000,500)*.01,
z=0.0)
segment3 = Sed(x=numpy.arange(1000,10000,500),
y=numpy.arange(1000,10000,500),
yerr=numpy.arange(1000,10000,500)*.01,
z = 0)
segment4 = Spectrum(x=numpy.arange(1000,10000,10),
y=numpy.arange(1000,10000,10),
yerr=numpy.arange(1000,10000,10)*.01,
z=0)
aggsed = Stack([segment1, segment2, segment3, segment4])
norm_aggsed = aggsed.normalize_by_int(correct_flux=True, z0=[1,.5,.1,1])
aggsed[0].z=1.0
aggsed[1].z=0.5
aggsed[2].z=0.1
aggsed[3].z=1.0
rf_aggsed=aggsed.shift(0.0)
rf_aggsed0=rf_aggsed[0].shift(1.0, correct_flux=False)
rf_aggsed1=rf_aggsed[1].shift(0.5, correct_flux=False)
rf_aggsed2=rf_aggsed[2].shift(0.1, correct_flux=False)
rf_aggsed3=rf_aggsed[3].shift(1.0, correct_flux=False)
rf_aggsed=Stack([rf_aggsed0,rf_aggsed1,rf_aggsed2,rf_aggsed3])
control_norm_aggsed = rf_aggsed.normalize_by_int()
self.assertAlmostEqual(norm_aggsed.segments[0].norm_constant, control_norm_aggsed[0].norm_constant)
self.assertAlmostEqual(norm_aggsed[1].norm_constant,1.4939309057e-08)
numpy.testing.assert_array_almost_equal(control_norm_aggsed[0].y,norm_aggsed[0].y)
sed=norm_aggsed[1]
control_sed=control_norm_aggsed[1]
numpy.testing.assert_array_almost_equal(control_sed.y,sed.y)
numpy.testing.assert_array_almost_equal(control_sed.y,sed.y)
def test_redshift_correct_flux(self):
sed1 = IrisSed(x=self.x,y=self.y,yerr=self.yerr, id='sed1', z=0.1)
sed2 = IrisSed(x=numpy.array([2,4,5,8,10]), y=numpy.arange(5)+1.0, yerr=numpy.arange(5)+1.0*0.1, id='sed2', z=0.1)
y = numpy.array([5.0, 15.0, 7.0, 4.5, 13.5, 10.5])
x = numpy.array([0.5, 1.5, 3.0, 5.0, 10.5, 21.0])
sed3 = IrisSed(x=x, y=y, yerr=y*0.1, id='sed3', z=0.1)
iris_stack = IrisStack([sed1, sed2, sed3])
shifted_iris_stack = iris_stack.shift(0.0, correct_flux=True)
sed1 = IrisSed(x=self.x,y=self.y,yerr=self.yerr, z=0.1)
sed2 = IrisSed(x=numpy.array([2,4,5,8,10]), y=numpy.arange(5)+1.0, yerr=numpy.arange(5)+1.0*0.1, z=0.2)
y = numpy.array([5.0, 15.0, 7.0, 4.5, 13.5, 10.5])
x = numpy.array([0.5, 1.5, 3.0, 5.0, 10.5, 21.0])
sed3 = IrisSed(x=x, y=y, yerr=y*0.1, z=0.3)
stack = Stack([sed1, sed2, sed3])
shifted_stack = stack.shift(0.0, correct_flux=True)
self.assertEqual(len(shifted_iris_stack.segments), 3)
numpy.testing.assert_array_almost_equal(shifted_stack[0].x, shifted_iris_stack[0].x)
numpy.testing.assert_array_almost_equal(shifted_stack[0].y, shifted_iris_stack[0].y)