Mapping¶
-
class
astropy.modeling.mappings.
Mapping
(mapping, n_inputs=None, name=None, meta=None)[source]¶ Bases:
astropy.modeling.FittableModel
Allows inputs to be reordered, duplicated or dropped.
- Parameters
- mappingtuple
A tuple of integers representing indices of the inputs to this model to return and in what order to return them. See Advanced mappings for more details.
- n_inputsint
Number of inputs; if
None
(default) thenmax(mapping) + 1
is used (i.e. the highest input index used in the mapping).- namestr, optional
A human-friendly name associated with this model instance (particularly useful for identifying the individual components of a compound model).
- metadict-like
Free-form metadata to associate with this model.
- Raises
- TypeError
Raised when number of inputs is less that
max(mapping)
.
Examples
>>> from astropy.modeling.models import Polynomial2D, Shift, Mapping >>> poly1 = Polynomial2D(1, c0_0=1, c1_0=2, c0_1=3) >>> poly2 = Polynomial2D(1, c0_0=1, c1_0=2.4, c0_1=2.1) >>> model = (Shift(1) & Shift(2)) | Mapping((0, 1, 0, 1)) | (poly1 & poly2) >>> model(1, 2) (17.0, 14.2)
Attributes Summary
Integers representing indices of the inputs.
Methods Summary
evaluate
(self, *args)Evaluate the model on some input variables.
Attributes Documentation
-
linear
= True¶
-
mapping
¶ Integers representing indices of the inputs.
-
n_inputs
¶
-
n_outputs
¶
Methods Documentation