def __init__(self,
light_model_list,
kwargs_fixed,
kwargs_lower=None,
kwargs_upper=None,
type='light',
linear_solver=True):
lightModel = LightModel(light_model_list=light_model_list)
self._param_name_list = lightModel.param_name_list()
self._type = type
self.model_list = light_model_list
self.kwargs_fixed = kwargs_fixed
if linear_solver:
self.kwargs_fixed = self.add_fixed_linear(self.kwargs_fixed)
self._linear_solve = linear_solver
if kwargs_lower is None:
kwargs_lower = []
for func in lightModel.func_list:
kwargs_lower.append(func.lower_limit_default)
if kwargs_upper is None:
kwargs_upper = []
for func in lightModel.func_list:
kwargs_upper.append(func.upper_limit_default)
self.lower_limit = kwargs_lower
self.upper_limit = kwargs_upper
class TestLightModel(object):
"""
tests the source model routines
"""
def setup(self):
self.light_model_list = [
'GAUSSIAN', 'MULTI_GAUSSIAN', 'SERSIC', 'SERSIC_ELLIPSE',
'CORE_SERSIC', 'SHAPELETS', 'HERNQUIST', 'HERNQUIST_ELLIPSE',
'PJAFFE', 'PJAFFE_ELLIPSE', 'UNIFORM', 'POWER_LAW', 'NIE',
'INTERPOL', 'SHAPELETS_POLAR_EXP'
]
phi_G, q = 0.5, 0.8
e1, e2 = param_util.phi_q2_ellipticity(phi_G, q)
self.kwargs = [
{
'amp': 1.,
'sigma_x': 1,
'sigma_y': 1.,
'center_x': 0,
'center_y': 0
}, # 'GAUSSIAN'
{
'amp': [1., 2],
'sigma': [1, 3],
'center_x': 0,
'center_y': 0
}, # 'MULTI_GAUSSIAN'
{
'amp': 1,
'R_sersic': 0.5,
'n_sersic': 1,
'center_x': 0,
'center_y': 0
}, # 'SERSIC'
{
'amp': 1,
'R_sersic': 0.5,
'n_sersic': 1,
'e1': e1,
'e2': e2,
'center_x': 0,
'center_y': 0
}, # 'SERSIC_ELLIPSE'
{
'amp': 1,
'R_sersic': 0.5,
'Re': 0.1,
'gamma': 2.,
'n_sersic': 1,
'e1': e1,
'e2': e2,
'center_x': 0,
'center_y': 0
},
# 'CORE_SERSIC'
{
'amp': [1, 1, 1],
'beta': 0.5,
'n_max': 1,
'center_x': 0,
'center_y': 0
}, # 'SHAPELETS'
{
'amp': 1,
'Rs': 0.5,
'center_x': 0,
'center_y': 0
}, # 'HERNQUIST'
{
'amp': 1,
'Rs': 0.5,
'center_x': 0,
'center_y': 0,
'e1': e1,
'e2': e2
}, # 'HERNQUIST_ELLIPSE'
{
'amp': 1,
'Ra': 1,
'Rs': 0.5,
'center_x': 0,
'center_y': 0
}, # 'PJAFFE'
{
'amp': 1,
'Ra': 1,
'Rs': 0.5,
'center_x': 0,
'center_y': 0,
'e1': e1,
'e2': e2
}, # 'PJAFFE_ELLIPSE'
{
'amp': 1
}, # 'UNIFORM'
{
'amp': 1.,
'gamma': 2.,
'e1': e1,
'e2': e2,
'center_x': 0,
'center_y': 0
}, # 'POWER_LAW'
{
'amp': .001,
'e1': 0,
'e2': 1.,
'center_x': 0,
'center_y': 0,
's_scale': 1.
}, # 'NIE'
{
'image': np.zeros((10, 10)),
'scale': 1,
'phi_G': 0,
'center_x': 0,
'center_y': 0
},
{
'amp': [1],
'n_max': 0,
'beta': 1,
'center_x': 0,
'center_y': 0
}
]
self.LightModel = LightModel(light_model_list=self.light_model_list)
def test_init(self):
model_list = [
'CORE_SERSIC', 'SHAPELETS', 'SHAPELETS_POLAR',
'SHAPELETS_POLAR_EXP', 'UNIFORM', 'CHAMELEON', 'DOUBLE_CHAMELEON',
'TRIPLE_CHAMELEON'
]
lightModel = LightModel(light_model_list=model_list)
assert len(lightModel.profile_type_list) == len(model_list)
def test_surface_brightness(self):
output = self.LightModel.surface_brightness(x=1,
y=1,
kwargs_list=self.kwargs)
npt.assert_almost_equal(output, 3.7065728131855824, decimal=6)
def test_surface_brightness_array(self):
output = self.LightModel.surface_brightness(x=[1],
y=[1],
kwargs_list=self.kwargs)
npt.assert_almost_equal(output[0], 3.7065728131855824, decimal=6)
def test_functions_split(self):
output = self.LightModel.functions_split(x=1.,
y=1.,
kwargs_list=self.kwargs)
npt.assert_almost_equal(output[0][0], 0.058549831524319168, decimal=6)
def test_re_normalize_flux(self):
kwargs_out = self.LightModel.re_normalize_flux(kwargs_list=self.kwargs,
norm_factor=2)
assert kwargs_out[0]['amp'] == 2 * self.kwargs[0]['amp']
def test_param_name_list(self):
param_name_list = self.LightModel.param_name_list()
assert len(self.light_model_list) == len(param_name_list)
def test_num_param_linear(self):
num = self.LightModel.num_param_linear(self.kwargs, list_return=False)
assert num == 18
num_list = self.LightModel.num_param_linear(self.kwargs,
list_return=True)
assert num_list[0] == 1
def test_update_linear(self):
response, n = self.LightModel.functions_split(1, 1, self.kwargs)
param = np.ones(n) * 2
kwargs_out, i = self.LightModel.update_linear(param,
i=0,
kwargs_list=self.kwargs)
assert i == n
assert kwargs_out[0]['amp'] == 2
def test_total_flux(self):
light_model_list = [
'SERSIC', 'SERSIC_ELLIPSE', 'INTERPOL', 'GAUSSIAN',
'GAUSSIAN_ELLIPSE', 'MULTI_GAUSSIAN', 'MULTI_GAUSSIAN_ELLIPSE'
]
kwargs_list = [
{
'amp': 1,
'R_sersic': 0.5,
'n_sersic': 1,
'center_x': 0,
'center_y': 0
}, # 'SERSIC'
{
'amp': 1,
'R_sersic': 0.5,
'n_sersic': 1,
'e1': 0.1,
'e2': 0,
'center_x': 0,
'center_y': 0
}, # 'SERSIC_ELLIPSE'
{
'image': np.ones((10, 10)),
'scale': 1,
'phi_G': 0,
'center_x': 0,
'center_y': 0
}, # 'INTERPOL'
{
'amp': 2,
'sigma_x': 2,
'sigma_y': 1,
'center_x': 0,
'center_y': 0
}, # 'GAUSSIAN'
{
'amp': 2,
'sigma': 2,
'e1': 0.1,
'e2': 0,
'center_x': 0,
'center_y': 0
}, # 'GAUSSIAN_ELLIPSE'
{
'amp': [1, 1],
'sigma': [2, 1],
'center_x': 0,
'center_y': 0
}, # 'MULTI_GAUSSIAN'
{
'amp': [1, 1],
'sigma': [2, 1],
'e1': 0.1,
'e2': 0,
'center_x': 0,
'center_y': 0
} # 'MULTI_GAUSSIAN_ELLIPSE'
]
lightModel = LightModel(light_model_list=light_model_list)
total_flux_list = lightModel.total_flux(kwargs_list)
assert total_flux_list[2] == 100
assert total_flux_list[3] == 2
assert total_flux_list[4] == 2
assert total_flux_list[5] == 2
assert total_flux_list[6] == 2
total_flux_list = lightModel.total_flux(kwargs_list, norm=True)
assert total_flux_list[2] == 100
assert total_flux_list[3] == 1
assert total_flux_list[4] == 1
assert total_flux_list[5] == 2
assert total_flux_list[6] == 2
class LightParam(object):
"""
"""
def __init__(self,
light_model_list,
kwargs_fixed,
kwargs_lower=None,
kwargs_upper=None,
type='light',
linear_solver=True):
self._lightModel = LightModel(light_model_list=light_model_list)
self._param_name_list = self._lightModel.param_name_list()
self._type = type
self.model_list = light_model_list
self.kwargs_fixed = kwargs_fixed
if linear_solver:
self.kwargs_fixed = self.add_fixed_linear(self.kwargs_fixed)
self._linear_solve = linear_solver
if kwargs_lower is None:
kwargs_lower = []
for func in self._lightModel.func_list:
kwargs_lower.append(func.lower_limit_default)
if kwargs_upper is None:
kwargs_upper = []
for func in self._lightModel.func_list:
kwargs_upper.append(func.upper_limit_default)
self.lower_limit = kwargs_lower
self.upper_limit = kwargs_upper
@property
def param_name_list(self):
return self._param_name_list
def getParams(self, args, i):
"""
:param args:
:param i:
:return:
"""
kwargs_list = []
for k, model in enumerate(self.model_list):
kwargs = {}
kwargs_fixed = self.kwargs_fixed[k]
param_names = self._param_name_list[k]
for name in param_names:
if not name in kwargs_fixed:
if model in [
'SHAPELETS', 'SHAPELETS_POLAR',
'SHAPELETS_POLAR_EXP'
] and name == 'amp':
if 'n_max' in kwargs_fixed:
n_max = kwargs_fixed['n_max']
else:
raise ValueError('n_max needs to be fixed in %s.' %
model)
if model in ['SHAPELETS_POLAR_EXP']:
num_param = int((n_max + 1)**2)
else:
num_param = int((n_max + 1) * (n_max + 2) / 2)
kwargs['amp'] = args[i:i + num_param]
i += num_param
elif model in ['MULTI_GAUSSIAN', 'MULTI_GAUSSIAN_ELLIPSE'
] and name == 'amp':
if 'sigma' in kwargs_fixed:
num_param = len(kwargs_fixed['sigma'])
else:
raise ValueError('sigma needs to be fixed in %s.' %
model)
kwargs['amp'] = args[i:i + num_param]
i += num_param
else:
kwargs[name] = args[i]
i += 1
else:
kwargs[name] = kwargs_fixed[name]
kwargs_list.append(kwargs)
return kwargs_list, i
def setParams(self, kwargs_list):
"""
:param kwargs_list:
:param bounds: bool, if True, ellitpicity of min/max
:return:
"""
args = []
for k, model in enumerate(self.model_list):
kwargs = kwargs_list[k]
kwargs_fixed = self.kwargs_fixed[k]
param_names = self._param_name_list[k]
for name in param_names:
if not name in kwargs_fixed:
if model in [
'SHAPELETS', 'SHAPELETS_POLAR',
'SHAPELETS_POLAR_EXP'
] and name == 'amp':
n_max = kwargs_fixed.get('n_max', kwargs['n_max'])
if model in ['SHAPELETS_POLAR_EXP']:
num_param = int((n_max + 1)**2)
else:
num_param = int((n_max + 1) * (n_max + 2) / 2)
for i in range(num_param):
args.append(kwargs[name][i])
elif model in ['MULTI_GAUSSIAN', 'MULTI_GAUSSIAN_ELLIPSE'
] and name == 'amp':
num_param = len(kwargs['sigma'])
for i in range(num_param):
args.append(kwargs[name][i])
elif model in ['MULTI_GAUSSIAN', 'MULTI_GAUSSIAN_ELLIPSE'
] and name == 'sigma':
raise ValueError(
"'sigma' must be a fixed keyword argument for MULTI_GAUSSIAN"
)
else:
args.append(kwargs[name])
return args
def num_param(self):
"""
:return:
"""
num = 0
list = []
for k, model in enumerate(self.model_list):
kwargs_fixed = self.kwargs_fixed[k]
param_names = self._param_name_list[k]
for name in param_names:
if not name in kwargs_fixed:
if model in [
'SHAPELETS', 'SHAPELETS_POLAR',
'SHAPELETS_POLAR_EXP'
] and name == 'amp':
if 'n_max' not in kwargs_fixed:
raise ValueError(
"n_max needs to be fixed in this configuration!"
)
n_max = kwargs_fixed['n_max']
if model in ['SHAPELETS_POLAR_EXP']:
num_param = int((n_max + 1)**2)
else:
num_param = int((n_max + 1) * (n_max + 2) / 2)
num += num_param
for i in range(num_param):
list.append(str(name + '_' + self._type + str(k)))
elif model in ['MULTI_GAUSSIAN', 'MULTI_GAUSSIAN_ELLIPSE'
] and name == 'amp':
num_param = len(kwargs_fixed['sigma'])
num += num_param
for i in range(num_param):
list.append(str(name + '_' + self._type + str(k)))
else:
num += 1
list.append(str(name + '_' + self._type + str(k)))
return num, list
def add_fixed_linear(self, kwargs_fixed_list):
"""
:param kwargs_fixed_list: list of fixed keyword arguments
:return: updated kwargs_fixed_list with additional linear parameters being fixed.
"""
for k, model in enumerate(self.model_list):
kwargs_fixed = kwargs_fixed_list[k]
param_names = self._param_name_list[k]
if 'amp' in param_names:
if not 'amp' in kwargs_fixed:
kwargs_fixed['amp'] = 1
return kwargs_fixed_list
def num_param_linear(self):
"""
:return: number of linear basis set coefficients
"""
return self._lightModel.num_param_linear(kwargs_list=self.kwargs_fixed)
def check_positive_flux_profile(self, kwargs_list):
pos_bool = True
for k, model in enumerate(self.model_list):
if 'amp' in kwargs_list[k]:
if model in [
'SERSIC', 'SERSIC_ELLIPSE', 'CORE_SERSIC', 'HERNQUIST',
'PJAFFE', 'PJAFFE_ELLIPSE', 'HERNQUIST_ELLIPSE',
'GAUSSIAN', 'GAUSSIAN_ELLIPSE', 'POWER_LAW', 'NIE',
'CHAMELEON', 'DOUBLE_CHAMELEON'
]:
if kwargs_list[k]['amp'] < 0:
pos_bool = False
break
return pos_bool
class TestLightModel(object):
"""
tests the source model routines
"""
def setup(self):
self.light_model_list = [
'GAUSSIAN', 'MULTI_GAUSSIAN', 'SERSIC', 'SERSIC_ELLIPSE',
'CORE_SERSIC', 'SHAPELETS', 'HERNQUIST', 'HERNQUIST_ELLIPSE',
'PJAFFE', 'PJAFFE_ELLIPSE', 'UNIFORM', 'POWER_LAW', 'NIE'
]
phi_G, q = 0.5, 0.8
e1, e2 = param_util.phi_q2_ellipticity(phi_G, q)
self.kwargs = [
{
'amp': 1.,
'sigma_x': 1,
'sigma_y': 1.,
'center_x': 0,
'center_y': 0
}, # 'GAUSSIAN'
{
'amp': [1., 2],
'sigma': [1, 3],
'center_x': 0,
'center_y': 0
}, # 'MULTI_GAUSSIAN'
{
'amp': 1,
'R_sersic': 0.5,
'n_sersic': 1,
'center_x': 0,
'center_y': 0
}, # 'SERSIC'
{
'amp': 1,
'R_sersic': 0.5,
'n_sersic': 1,
'e1': e1,
'e2': e2,
'center_x': 0,
'center_y': 0
}, # 'SERSIC_ELLIPSE'
{
'amp': 1,
'R_sersic': 0.5,
'Re': 0.1,
'gamma': 2.,
'n_sersic': 1,
'e1': e1,
'e2': e2,
'center_x': 0,
'center_y': 0
},
# 'CORE_SERSIC'
{
'amp': [1, 1, 1],
'beta': 0.5,
'n_max': 1,
'center_x': 0,
'center_y': 0
}, # 'SHAPELETS'
{
'amp': 1,
'Rs': 0.5,
'center_x': 0,
'center_y': 0
}, # 'HERNQUIST'
{
'amp': 1,
'Rs': 0.5,
'center_x': 0,
'center_y': 0,
'e1': e1,
'e2': e2
}, # 'HERNQUIST_ELLIPSE'
{
'amp': 1,
'Ra': 1,
'Rs': 0.5,
'center_x': 0,
'center_y': 0
}, # 'PJAFFE'
{
'amp': 1,
'Ra': 1,
'Rs': 0.5,
'center_x': 0,
'center_y': 0,
'e1': e1,
'e2': e2
}, # 'PJAFFE_ELLIPSE'
{
'amp': 1
}, # 'UNIFORM'
{
'amp': 1.,
'gamma': 2.,
'e1': e1,
'e2': e2,
'center_x': 0,
'center_y': 0
}, # 'POWER_LAW'
{
'amp': .001,
'e1': 0,
'e2': 1.,
'center_x': 0,
'center_y': 0,
's_scale': 1.
}, # 'NIE'
]
self.LightModel = LightModel(light_model_list=self.light_model_list)
def test_init(self):
model_list = [
'CORE_SERSIC', 'SHAPELETS', 'UNIFORM', 'CHAMELEON',
'DOUBLE_CHAMELEON'
]
lightModel = LightModel(light_model_list=model_list)
assert len(lightModel.profile_type_list) == len(model_list)
def test_surface_brightness(self):
output = self.LightModel.surface_brightness(x=1,
y=1,
kwargs_list=self.kwargs)
npt.assert_almost_equal(output, 3.512593731652167, decimal=6)
def test_surface_brightness_array(self):
output = self.LightModel.surface_brightness(x=[1],
y=[1],
kwargs_list=self.kwargs)
npt.assert_almost_equal(output[0], 3.512593731652167, decimal=6)
def test_functions_split(self):
output = self.LightModel.functions_split(x=1.,
y=1.,
kwargs_list=self.kwargs)
npt.assert_almost_equal(output[0][0], 0.058549831524319168, decimal=6)
def test_re_normalize_flux(self):
kwargs_out = self.LightModel.re_normalize_flux(kwargs_list=self.kwargs,
norm_factor=2)
assert kwargs_out[0]['amp'] == 2 * self.kwargs[0]['amp']
def test_param_name_list(self):
param_name_list = self.LightModel.param_name_list()
assert len(self.light_model_list) == len(param_name_list)
def test_update_linear(self):
response, n = self.LightModel.functions_split(1, 1, self.kwargs)
param = np.ones(n) * 2
kwargs_out, i = self.LightModel.update_linear(param,
i=0,
kwargs_list=self.kwargs)
assert i == n
assert kwargs_out[0]['amp'] == 2
