def theta(self, a):
"""
Arguments
---------
a : angle of rotation [rad]
Return
------
θ : scattering angle in the lab system [rad]
"""
D0 = self.D(0.0)
D = self.D(a)
Rd = self.R + self.d
if isinstance(a, (int, float, np.number, uncertainties.core.AffineScalarFunc)):
return np.sign(a) * umath.acos(
(D0**2.0 + D**2.0 - 2.0 * Rd**2.0 *
(1.0 - umath.cos(a))) / (2.0 * D0 * D)
)
elif isinstance(a, np.ndarray):
return np.sign(a) * unp.arccos(
(D0**2.0 + D**2.0 - 2.0 * Rd**2.0 *
(1.0 - unp.cos(a))) / (2.0 * D0 * D)
)
else:
raise ValueError(
f"This function not supported for the input types. argument 'a' must be number or array")
def inclination(P_days, Ms_Msun, Rs_Rsun, b,
mp_Mearth=0., ecc=0., omega_deg=0.):
'''Compute the inclination from the impact parameter and scaled
semimajor axis.'''
sma, omega = semimajoraxis(P_days, Ms_Msun, mp_Mearth), \
unumpy.radians(omega_deg)
a_Rs = AU2m(sma) / Rsun2m(Rs_Rsun)
return unumpy.degrees(unumpy.arccos(b / a_Rs * \
((1+ecc*unumpy.sin(omega)) / \
(1-ecc**2))))
def e_geo(x, d=0):
d /= 2
a = unumpy.sqrt(x**2 + (2 - d) ** 2)
# Look at geometric_efficiency.png to see what these mean
h1 = ufloat(2,0.1)
h2 = ufloat(3,0.1)
w1 = ufloat(22, 0.1)
w2 = ufloat(30, 0.1)
if x < 8:
c = unumpy.sqrt(((w1 + w2) / 2)**2 + (h2 - h1)**2)
b = unumpy.sqrt((h2 - d)**2 + ((w1 + w2) / 2 - x)**2)
else:
c = w1
b = unumpy.sqrt((w1 - x)**2 + (h1 - d)**2)
theta = unumpy.arccos((a**2 + b**2 - c**2) / (2 * a * b))
return (1 - unumpy.cos(theta / 2)) / 2
def arccos(number):
if isinstance(number, fr.Fraction):
number = Mixed(number)
elif isinstance(number, uc.UFloat):
number = Mixed(number)
elif isinstance(number, int):
number = Mixed(number)
elif isinstance(number, float):
number = Mixed(number)
assert isinstance(number, Mixed), \
"Cannot calculate arccos of object of type %s." % (type(number))
if isinstance(number.value, uc.UFloat):
return Mixed(unumpy.arccos(number.value).item())
elif isinstance(number.value, fr.Fraction):
return Mixed(np.arccos(float(number.value)))
elif isinstance(number.value, int):
return Mixed(np.arccos(number.value))
elif isinstance(number.value, float):
return Mixed(np.arccos(number.value))
def arccos(number):
if isinstance(number, fr.Fraction):
number = Mixed(number)
elif isinstance(number, uc.UFloat):
number = Mixed(number)
elif isinstance(number, int):
number = Mixed(number)
elif isinstance(number, float):
number = Mixed(number)
assert isinstance(number, Mixed), \
"Cannot calculate arccos of object of type %s." % (type(number))
if isinstance(number.value, uc.UFloat):
return Mixed(unumpy.arccos(number.value).item())
elif isinstance(number.value, fr.Fraction):
return Mixed(np.arccos(float(number.value)))
elif isinstance(number.value, int):
return Mixed(np.arccos(number.value))
elif isinstance(number.value, float):
return Mixed(np.arccos(number.value))
def test_broadcast_funcs():
"""
Test of mathematical functions that work with NumPy arrays of
numbers with uncertainties.
"""
x = uncertainties.ufloat((0.2, 0.1))
arr = numpy.array([x, 2*x])
assert unumpy.cos(arr)[1] == uncertainties.umath.cos(arr[1])
# Some functions do not bear the same name in the math module and
# in NumPy (acos instead of arccos, etc.):
assert unumpy.arccos(arr)[1] == uncertainties.umath.acos(arr[1])
# The acos() function should not exist in unumpy because it does
# not exist in numpy:
assert not hasattr(numpy, 'acos')
assert not hasattr(unumpy, 'acos')
# Test of the __all__ variable:
assert 'acos' not in unumpy.__all__
def test_broadcast_funcs():
"""
Test of mathematical functions that work with NumPy arrays of
numbers with uncertainties.
"""
x = uncertainties.ufloat((0.2, 0.1))
arr = numpy.array([x, 2*x])
assert unumpy.cos(arr)[1] == uncertainties.umath.cos(arr[1])
# Some functions do not bear the same name in the math module and
# in NumPy (acos instead of arccos, etc.):
assert unumpy.arccos(arr)[1] == uncertainties.umath.acos(arr[1])
# The acos() function should not exist in unumpy because it does
# not exist in numpy:
assert not hasattr(numpy, 'acos')
assert not hasattr(unumpy, 'acos')
# Test of the __all__ variable:
assert 'acos' not in unumpy.__all__
def theta(theta_lab, n):
"""
function to convert θ in the lab system to θ in the center-of-mass system
Arguments
---------
theta_lab : scattering angle in the lab system [rad]
n : A_t / A_i; A_t, A_i means mass number of target particle or incident particle
Return
------
theta_cm : scattering angle in the center-of-mass system [rad]
Notice
------
This function do not consider relativity
"""
if isinstance(theta_lab, uncertainties.core.AffineScalarFunc):
coslab2 = umath.pow(umath.cos(theta_lab), 2.0)
coscm = (coslab2 - 1.0) / n \
+ umath.sqrt((1.0 - 1.0 / n**2.0) * coslab2 +
umath.pow(coslab2 / n, 2.0))
return np.sign(theta_lab) * umath.acos(coscm)
elif isinstance(theta_lab, np.ndarray) and isinstance(
theta_lab[0], uncertainties.core.AffineScalarFunc):
coslab2 = unp.pow(unp.cos(theta_lab), 2.0)
coscm = (coslab2 - 1.0) / n \
+ unp.sqrt((1.0 - 1.0 / n**2.0) * coslab2 +
unp.pow(coslab2 / n, 2.0))
return np.sign(theta_lab) * unp.arccos(coscm)
else:
coslab2 = np.power(np.cos(theta_lab), 2.0)
coscm = (coslab2 - 1.0) / n \
+ np.sqrt((1.0 - 1.0 / n**2.0) * coslab2 +
np.power(coslab2 / n, 2.0))
return np.sign(theta_lab) * np.arccos(coscm)
def geometric_elements_with_uncertainties(thiele_innes_parameters,
thiele_innes_parameters_errors=None,
correlation_matrix=None,
post_process=False,
return_angles_in_deg=True):
"""
Return geometrical orbit elements a, omega, OMEGA, i. If errors are not given
they are assumed to be 0 and correlation matrix is set to identity.
Complement to the pystrometry.geometric_elements function that allows to
compute parameter uncertainties as well.
Parameters
----------
thiele_innes_parameters : array
Array of Thiele Innes parameters [A,B,F,G] in milli-arcsecond
thiele_innes_parameters_errors : array, optional
Array of the errors of the Thiele Innes parameters [A,B,F,G] in milli-arcsecond
correlation_matrix : (4, 4) array, optional
Correlation matrix for the Thiele Innes parameters [A,B,F,G]
Returns
-------
geometric_parameters : array
Orbital elements [a_mas, omega_deg, OMEGA_deg, i_deg]
geometric_parameters_errors : array
Errors of the orbital elements [a_mas, omega_deg, OMEGA_deg, i_deg]
"""
# Checks on the errors and correlation matrix
if (thiele_innes_parameters_errors is None) and (correlation_matrix is
None):
# Define errors to 0 and correlation matrix to identity
thiele_innes_parameters_errors = [0, 0, 0, 0]
correlation_matrix = np.identity(4)
elif (thiele_innes_parameters_errors is not None) and (correlation_matrix
is not None):
# If both are given continue to the calculation
pass
else:
# If either one of them is provided but not the other raise an error
raise ValueError("thieles_innes_parameters_erros and correlation_matrix must be" \
"specified together.")
# Define uncorrelated (value, uncertainty) pairs
A_u = (thiele_innes_parameters[0], thiele_innes_parameters_errors[0])
B_u = (thiele_innes_parameters[1], thiele_innes_parameters_errors[1])
F_u = (thiele_innes_parameters[2], thiele_innes_parameters_errors[2])
G_u = (thiele_innes_parameters[3], thiele_innes_parameters_errors[3])
# Create correlated quantities
A, B, F, G = correlated_values_norm([A_u, B_u, F_u, G_u],
correlation_matrix)
p = (A**2 + B**2 + G**2 + F**2) / 2.
q = A * G - B * F
a_mas = unp.sqrt(p + unp.sqrt(p**2 - q**2))
i_rad = unp.arccos(q / (a_mas**2.))
omega_rad = (unp.arctan2(B - F, A + G) + unp.arctan2(-B - F, A - G)) / 2.
OMEGA_rad = (unp.arctan2(B - F, A + G) - unp.arctan2(-B - F, A - G)) / 2.
if post_process:
# convert angles to nominal ranges
omega_rad, OMEGA_rad = pystrometry.adjust_omega_OMEGA(
omega_rad, OMEGA_rad)
if return_angles_in_deg:
# Convert radians to degrees
i_deg = i_rad * 180 / np.pi
omega_deg = omega_rad * 180 / np.pi
OMEGA_deg = OMEGA_rad * 180 / np.pi
else:
i_deg = i_rad
omega_deg = omega_rad
OMEGA_deg = OMEGA_rad
# Extract nominal values and standard deviations
geometric_parameters = np.array([
unp.nominal_values(a_mas),
unp.nominal_values(omega_deg),
unp.nominal_values(OMEGA_deg),
unp.nominal_values(i_deg)
])
geometric_parameters_errors = np.array([
unp.std_devs(a_mas),
unp.std_devs(omega_deg),
unp.std_devs(OMEGA_deg),
unp.std_devs(i_deg)
])
return geometric_parameters, geometric_parameters_errors
alpha_plot = np.linspace(-1, 7)
plt.errorbar(np.radians(225),unp.nominal_values(U_6),unp.std_devs(U_6),fmt='kx',label="Ausgewerte Daten")
plt.errorbar(np.radians(270),unp.nominal_values(U_7),unp.std_devs(U_7),fmt='kx')
plt.errorbar(np.radians(315),unp.nominal_values(U_8),unp.std_devs(U_8),fmt='kx')
plt.errorbar(np.radians(360),unp.nominal_values(U_9),unp.std_devs(U_9),fmt='kx')
plt.errorbar(np.radians(0),unp.nominal_values(U_1),unp.std_devs(U_1),fmt='rx')
plt.errorbar(np.radians(45),unp.nominal_values(U_2),unp.std_devs(U_2),fmt='rx')
plt.errorbar(np.radians(90),unp.nominal_values(U_3),unp.std_devs(U_3),fmt='rx')
plt.errorbar(np.radians(135),unp.nominal_values(U_4),unp.std_devs(U_4),fmt='rx',label="Nichtausgewerte Daten")
plt.errorbar(np.radians(180),unp.nominal_values(U_5),unp.std_devs(U_5),fmt='kx')
plt.plot(alpha_plot, f(alpha_plot, *params), 'b-', label='linearer Fit')
plt.legend(loc="best")
plt.xlim(-0.5,7)
plt.xticks([0, np.pi / 2, np.pi, 3 * np.pi / 2, 2 * np.pi],
[r"$0$", r"$\frac{\pi}{2}$", r"$\pi$", r"$\frac{3\pi}{2}$", r"$2\pi$"])
plt.xlabel(r'$\mathrm{Winkel}$')
plt.ylabel(r'$\mathrm{Spannung}\,U /mV$')
plt.ylim(28,42)
#plt.savefig('../Bilder/plot2.pdf')
plt.show()
plt.close()
IW1=unp.arccos(min1/max1)*180/np.pi
IW2=unp.arccos(min2/max2)*180/np.pi
print('')
print('IW1=',IW1)
print('IW2=',IW2)
