Multiply

class astropy.modeling.functional_models.Multiply(factor=1, **kwargs)

Bases: Fittable1DModel

Multiply a model by a quantity or number.

Parameters:

factorfloat

Factor by which to multiply a coordinate.

Attributes Summary

factor
fittable
linear
param_names	Names of the parameters that describe models of this type.

Methods Summary

evaluate(x, factor)	One dimensional multiply model function.
fit_deriv(x, *params)	One dimensional multiply model derivative with respect to parameter.

Attributes Documentation

factor = Parameter('factor', value=1.0)

fittable = True

linear = True

param_names = ('factor',)

Names of the parameters that describe models of this type.

The parameters in this tuple are in the same order they should be passed in when initializing a model of a specific type. Some types of models, such as polynomial models, have a different number of parameters depending on some other property of the model, such as the degree.

When defining a custom model class the value of this attribute is automatically set by the Parameter attributes defined in the class body.

Methods Documentation

static evaluate(x, factor)

One dimensional multiply model function.

static fit_deriv(x, *params)

One dimensional multiply model derivative with respect to parameter.