RedshiftScaleFactor¶
-
class
astropy.modeling.functional_models.
RedshiftScaleFactor
(z=0, **kwargs)[source]¶ Bases:
astropy.modeling.Fittable1DModel
One dimensional redshift scale factor model.
- Parameters
- z
float
Redshift value.
- z
Notes
Model formula:
\[f(x) = x (1 + z)\]Attributes Summary
Names of the parameters that describe models of this type.
Methods Summary
evaluate
(x, z)One dimensional RedshiftScaleFactor model function
fit_deriv
(x, z)One dimensional RedshiftScaleFactor model derivative
Attributes Documentation
-
param_names
= ('z',)¶ Names of the parameters that describe models of this type.
The parameters in this tuple are in the same order they should be passed in when initializing a model of a specific type. Some types of models, such as polynomial models, have a different number of parameters depending on some other property of the model, such as the degree.
When defining a custom model class the value of this attribute is automatically set by the
Parameter
attributes defined in the class body.
-
z
= Parameter('z', value=0.0)¶
Methods Documentation