AffineTransformation2D

class astropy.modeling.projections.AffineTransformation2D

Bases: astropy.modeling.Model

Perform an affine transformation in 2 dimensions.

Parameters:

matrix : array

A 2x2 matrix specifying the linear transformation to apply to the inputs

translation : array

A 2D vector (given as either a 2x1 or 1x2 array) specifying a translation to apply to the inputs

Attributes Summary

inputs
inverse	Inverse transformation.
matrix
outputs
param_names
standard_broadcasting
translation

Methods Summary

__call__(x, y[, model_set_axis])	Evaluate this model using the given input(s) and the parameter values that were specified when the model was instantiated.
evaluate(x, y, matrix, translation)	Apply the transformation to a set of 2D Cartesian coordinates given as two lists–one for the x coordinates and one for a y coordinates–or a single coordinate pair.

Attributes Documentation

inputs = (u'x', u'y')

inverse

Inverse transformation.

Raises InputParameterError if the transformation cannot be inverted.

matrix

outputs = (u'x', u'y')

param_names = ('matrix', 'translation')

standard_broadcasting = False

translation

Methods Documentation

__call__(x, y, model_set_axis=None)

Evaluate this model using the given input(s) and the parameter values that were specified when the model was instantiated.

classmethod evaluate(x, y, matrix, translation)

Apply the transformation to a set of 2D Cartesian coordinates given as two lists–one for the x coordinates and one for a y coordinates–or a single coordinate pair.

Parameters:

x, y : array, float

x and y coordinates