Scale¶

class
astropy.modeling.functional_models.
Scale
(factor=1, **kwargs)[source]¶ Bases:
astropy.modeling.Fittable1DModel
Multiply a model by a dimensionless factor.
 Parameters
 factor
float
Factor by which to scale a coordinate.
 factor
Notes
If
factor
is aQuantity
then the units will be stripped before the scaling operation.Attributes Summary
This property is used to indicate what units or sets of units the evaluate method expects, and returns a dictionary mapping inputs to units (or
None
if any units are accepted).Names of the parameters that describe models of this type.
Methods Summary
evaluate
(x, factor)One dimensional Scale model function
fit_deriv
(x, *params)One dimensional Scale model derivative with respect to parameter
Attributes Documentation

factor
= Parameter('factor', value=1.0)¶

fittable
= True¶

input_units
¶

linear
= True¶

param_names
= ('factor',)¶ 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.
Methods Documentation