Const2D

class astropy.modeling.functional_models.Const2D(amplitude=1, **kwargs)

Bases: astropy.modeling.Fittable2DModel

Two dimensional Constant model.

Parameters:

amplitude : float

Value of the constant function

Other Parameters:  

fixed : a dict

A dictionary {parameter_name: boolean} of parameters to not be varied during fitting. True means the parameter is held fixed. Alternatively the fixed property of a parameter may be used.

tied : dict

A dictionary {parameter_name: callable} of parameters which are linked to some other parameter. The dictionary values are callables providing the linking relationship. Alternatively the tied property of a parameter may be used.

bounds : dict

A dictionary {parameter_name: boolean} of lower and upper bounds of parameters. Keys are parameter names. Values are a list of length 2 giving the desired range for the parameter. Alternatively the min and max properties of a parameter may be used.

eqcons : list

A list of functions of length n such that eqcons[j](x0,*args) == 0.0 in a successfully optimized problem.

ineqcons : list

A list of functions of length n such that ieqcons[j](x0,*args) >= 0.0 is a successfully optimized problem.

See also

Const1D

Notes

Model formula:

\[f(x, y) = A\]

Attributes Summary

amplitude
input_units
linear
param_names

Methods Summary

evaluate(x, y, amplitude)

Two dimensional Constant model function

Attributes Documentation

amplitude

input_units

linear = True

param_names = ('amplitude',)

Methods Documentation

static evaluate(x, y, amplitude)

Two dimensional Constant model function