sourcextractor.config.model_fitting.Range Class Reference

Inheritance diagram for sourcextractor.config.model_fitting.Range:

Collaboration diagram for sourcextractor.config.model_fitting.Range:

Public Member Functions
	__init__ (self, limits, type)
	get_min (self, v, o)
	get_max (self, v, o)
	get_type (self)
	__str__ (self)

Private Attributes
	__limits = limits
	__callable = limits if hasattr(limits, '__call__') else lambda v, o: limits
	__type = type

Detailed Description

Limit, and normalize, the range of values for a model fitting parameter.


Parameters
----------
limits : a tuple (min, max), or a callable that receives a source, and returns a tuple (min, max)
type : RangeType

Notes
-----
RangeType.LINEAR
    Normalized to engine space using a sigmoid function

    .. math::

        engine = \ln \frac{world - min}{max-world} \\
        world = min + \frac{max - min}{1 + e^{engine}}

RangeType.EXPONENTIAL
    Normalized to engine space using an exponential sigmoid function

    .. math::

        engine = \ln \left( \frac{\ln(world/min)}{\ln(max /world)} \right) \\
        world = min * e^\frac{ \ln(max / min) }{ (1 + e^{-engine}) }

Definition at line 42 of file model_fitting.py.

Constructor & Destructor Documentation

__init__()

sourcextractor.config.model_fitting.Range.__init__	(		self,
			limits,
			type )

Constructor.

Definition at line 72 of file model_fitting.py.

Member Function Documentation

__str__()

sourcextractor.config.model_fitting.Range.__str__

(

self

)

Returns
-------
str
    Human readable representation for the object

Definition at line 114 of file model_fitting.py.

References __limits, and __type.

get_max()

sourcextractor.config.model_fitting.Range.get_max	(		self,
			v,
			o )

Parameters
----------
v : initial value
o : object being fitted

Returns
-------
The maximum acceptable value for the range

Definition at line 93 of file model_fitting.py.

References __callable.

get_min()

sourcextractor.config.model_fitting.Range.get_min	(		self,
			v,
			o )

Parameters
----------
v : initial value
o : object being fitted

Returns
-------
The minimum acceptable value for the range

Definition at line 80 of file model_fitting.py.

References __callable.

get_type()

sourcextractor.config.model_fitting.Range.get_type

(

self

)

Returns
-------
RangeType

Definition at line 106 of file model_fitting.py.

References __type.

Member Data Documentation

__callable

sourcextractor.config.model_fitting.Range.__callable = limits if hasattr(limits, '__call__') else lambda v, o: limits

private

Definition at line 77 of file model_fitting.py.

Referenced by get_max(), get_min(), sourcextractor.config.model_fitting.Unbounded.get_normalization_factor(), and sourcextractor.config.model_fitting.ConstantParameter.get_value().

__limits

sourcextractor.config.model_fitting.Range.__limits = limits

private

Definition at line 76 of file model_fitting.py.

Referenced by __str__().

__type

sourcextractor.config.model_fitting.Range.__type = type

private

Definition at line 78 of file model_fitting.py.

Referenced by __str__(), and get_type().

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

• SEImplementation/python/sourcextractor/config/model_fitting.py