Linear1D¶

class
astropy.modeling.functional_models.
Linear1D
(slope=1, intercept=0, **kwargs)[source]¶ Bases:
astropy.modeling.Fittable1DModel
One dimensional Line model.
Parameters:  slope : float
Slope of the straight line
 intercept : float
Intercept of the straight line
Other Parameters:  fixed : a dict, optional
A dictionary
{parameter_name: boolean}
of parameters to not be varied during fitting. True means the parameter is held fixed. Alternatively thefixed
property of a parameter may be used. tied : dict, optional
A dictionary
{parameter_name: callable}
of parameters which are linked to some other parameter. The dictionary values are callables providing the linking relationship. Alternatively thetied
property of a parameter may be used. bounds : dict, optional
A dictionary
{parameter_name: value}
of lower and upper bounds of parameters. Keys are parameter names. Values are a list or a tuple of length 2 giving the desired range for the parameter. Alternatively, themin
andmax
properties of a parameter may be used. eqcons : list, optional
A list of functions of length
n
such thateqcons[j](x0,*args) == 0.0
in a successfully optimized problem. ineqcons : list, optional
A list of functions of length
n
such thatieqcons[j](x0,*args) >= 0.0
is a successfully optimized problem.
See also
Notes
Model formula:
\[f(x) = a x + b\]Attributes Summary
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).intercept
linear
param_names
slope
Methods Summary
evaluate
(x, slope, intercept)One dimensional Line model function fit_deriv
(x, slope, intercept)One dimensional Line model derivative with respect to parameters 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 subclasses 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.

intercept
¶

linear
= True¶

param_names
= ('slope', 'intercept')¶

slope
¶
Methods Documentation