Shift¶
-
class
astropy.modeling.functional_models.
Shift
(offset=0, **kwargs)[source]¶ Bases:
astropy.modeling.Fittable1DModel
Shift a coordinate.
- Parameters
- offsetfloat
Offset to add to a coordinate.
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).Methods Summary
evaluate
(x, offset)One dimensional Shift model function
fit_deriv
(x, *params)One dimensional Shift model derivative with respect to parameter
Evaluate the implicit term (x) of one dimensional Shift model
Attributes Documentation
-
input_units
¶ 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).Model sub-classes can also use function annotations in evaluate to indicate valid input units, in which case this property should not be overridden since it will return the input units based on the annotations.
-
linear
= True¶
-
offset
= Parameter('offset', value=0.0)¶
-
param_names
= ('offset',)¶
Methods Documentation