BrokenPowerLaw1D¶
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class
astropy.modeling.powerlaws.
BrokenPowerLaw1D
(amplitude=1, x_break=1, alpha_1=1, alpha_2=1, **kwargs)[source] [edit on github]¶ Bases:
astropy.modeling.Fittable1DModel
One dimensional power law model with a break.
Parameters: amplitude : float
Model amplitude at the break point.
x_break : float
Break point.
alpha_1 : float
Power law index for x < x_break.
alpha_2 : float
Power law index for x > x_break.
See also
Notes
Model formula (with for
amplitude
and foralpha_1
and foralpha_2
):Attributes Summary
alpha_1
alpha_2
amplitude
input_units
param_names
x_break
Methods Summary
evaluate
(x, amplitude, x_break, alpha_1, alpha_2)One dimensional broken power law model function fit_deriv
(x, amplitude, x_break, alpha_1, ...)One dimensional broken power law derivative with respect to parameters Attributes Documentation
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alpha_1
¶
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alpha_2
¶
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amplitude
¶
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input_units
¶
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param_names
= ('amplitude', 'x_break', 'alpha_1', 'alpha_2')¶
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x_break
¶
Methods Documentation
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static
evaluate
(x, amplitude, x_break, alpha_1, alpha_2)[source] [edit on github]¶ One dimensional broken power law model function
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static
fit_deriv
(x, amplitude, x_break, alpha_1, alpha_2)[source] [edit on github]¶ One dimensional broken power law derivative with respect to parameters
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