ExponentialCutoffPowerLaw1D¶
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class
astropy.modeling.powerlaws.
ExponentialCutoffPowerLaw1D
[source] [edit on github]¶ Bases:
astropy.modeling.Fittable1DModel
One dimensional power law model with an exponential cutoff.
Parameters: amplitude : float
Model amplitude
x_0 : float
Reference point
alpha : float
Power law index
x_cutoff : float
Cutoff point
See also
Notes
Model formula (with \(A\) for
amplitude
and \(\alpha\) foralpha
):\[f(x) = A (x / x_0) ^ {-\alpha} \exp (-x / x_{cutoff})\]Attributes Summary
alpha
amplitude
param_names
x_0
x_cutoff
Methods Summary
evaluate
(x, amplitude, x_0, alpha, x_cutoff)One dimensional exponential cutoff power law model function fit_deriv
(x, amplitude, x_0, alpha, x_cutoff)One dimensional exponential cutoff power law derivative with respect to parameters Attributes Documentation
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alpha
¶
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amplitude
¶
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param_names
= ('amplitude', 'x_0', 'alpha', 'x_cutoff')¶
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x_0
¶
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x_cutoff
¶
Methods Documentation
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static
evaluate
(x, amplitude, x_0, alpha, x_cutoff)[source] [edit on github]¶ One dimensional exponential cutoff power law model function
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static
fit_deriv
(x, amplitude, x_0, alpha, x_cutoff)[source] [edit on github]¶ One dimensional exponential cutoff power law derivative with respect to parameters
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