StepLo1D¶

class sherpa.models.basic.StepLo1D(name='steplo1d')[source]¶

Bases: sherpa.models.model.ArithmeticModel

One-dimensional step function.

The model is flat below xcut, where it is set to the ampl parameter, and zero above this.

xcut¶: The position of the step.

ampl¶: The amplitude of the step.

Notes

The functional form of the model for points is:

f(x) = ampl if x <= xcut
     = 0       otherwise

and for an integrated grid it is:

f(xlo,xhi) = ampl * (xhi - xlo)  if xhi <= xcut
           = ampl * (xcut - xlo) if xlo <= xcut and xhi > xcut
           = 0                   if xlo > xcut

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)[source]¶

reset()¶

set_center(*args, **kwargs)¶

startup()¶

teardown()¶