Const1D

class astropy.modeling.functional_models.Const1D(amplitude, **constraints)

Bases: astropy.modeling.core.Parametric1DModel

One dimensional Constant model.

Parameters:

amplitude : float

Value of the constant function

See also

Const2D

Notes

Model formula:

f(x) = A

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.

Attributes Summary

amplitude
param_names	list() -> new empty list

Methods Summary

deriv(x, amplitude)	One dimensional Constant model derivative
eval(x, amplitude)	One dimensional Constant model function

Attributes Documentation

amplitude

param_names = ['amplitude']

Methods Documentation

static deriv(x, amplitude)

One dimensional Constant model derivative

static eval(x, amplitude)

One dimensional Constant model function