Delta1D¶
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class
sherpa.models.basic.
Delta1D
(name='delta1d')[source] [edit on github]¶ Bases:
sherpa.models.model.RegriddableModel1D
One-dimensional delta function.
The delta function model is only non-zero at a single point (or bin for integrated grids).
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pos
¶ The position of the signal.
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ampl
¶ The amplitude.
Notes
The functional form of the model for points is:
f(x) = ampl if x == pos = 0 otherwise
and for an integrated grid it is:
f(lo,hi) = ampl if lo <= pos <= hi = 0 otherwise
This behavior is different to how the amplitude is handled in other models, such as
Const1D
.Attributes Summary
thawedparhardmaxes
thawedparhardmins
thawedparmaxes
thawedparmins
thawedpars
Methods Summary
apply
(outer, *otherargs, **otherkwargs)calc
(pars, xlo, *args, **kwargs)get_center
()guess
(dep, *args, **kwargs)Set an initial guess for the parameter values. regrid
(*arrays)reset
()set_center
(pos, *args, **kwargs)startup
(cache)Called before a model may be evaluated multiple times. teardown
()Called after a model may be evaluated multiple times. Attributes Documentation
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thawedparhardmaxes
¶
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thawedparhardmins
¶
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thawedparmaxes
¶
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thawedparmins
¶
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thawedpars
¶
Methods Documentation
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apply
(outer, *otherargs, **otherkwargs) [edit on github]¶
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calc
(pars, xlo, *args, **kwargs) [edit on github]¶
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get_center
()[source] [edit on github]¶
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guess
(dep, *args, **kwargs)[source] [edit on github]¶ Set an initial guess for the parameter values.
Attempt to set the parameter values, and ranges, for the model to match the data values. This is intended as a rough guess, so it is expected that the model is only evaluated a small number of times, if at all.
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regrid
(*arrays) [edit on github]¶
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reset
() [edit on github]¶
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set_center
(pos, *args, **kwargs)[source] [edit on github]¶
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startup
(cache) [edit on github]¶ Called before a model may be evaluated multiple times.
See also
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teardown
() [edit on github]¶ Called after a model may be evaluated multiple times.
See also
setup()
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