Erf

class sherpa.models.basic.Erf(name='erf')

Bases: sherpa.models.model.ArithmeticModel

One-dimensional error function [1].

ampl

The amplitude of the model.

offset

The offset of the model.

sigma

The scaling factor.

See also

Erfc

Notes

The functional form of the model for points is:

f(x) = ampl * erf((x - offset) / sigma)

erf(y) = (2 / sqrt(pi)) Int_0^y exp(-t^2) dt

and for an integrated grid it is the integral of this over the bin.

References

[1]	http://mathworld.wolfram.com/Erf.html

Attributes Summary

thawedparhardmaxes
thawedparhardmins
thawedparmaxes
thawedparmins
thawedpars

Methods Summary

apply(outer, \*otherargs, \*\*otherkwargs)
calc(pars, xlo, \*args, \*\*kwargs)
get_center()
guess(dep, \*args, \*\*kwargs)
reset()
set_center(\*args, \*\*kwargs)
startup()
teardown()

Attributes Documentation

thawedparhardmaxes

thawedparhardmins

thawedparmaxes

thawedparmins

thawedpars

Methods Documentation

apply(outer, *otherargs, **otherkwargs)

calc(pars, xlo, *args, **kwargs)

get_center()

guess(dep, *args, **kwargs)

reset()

set_center(*args, **kwargs)

startup()

teardown()