reset

sherpa.astro.ui.reset(model=None, id=None)

Reset the model parameters to their default settings.

The reset function restores the parameter values to the default value set by guess or to the user-defined default. If the user set initial model values or soft limits - e.g. either with set_par or by using parameter prompting via paramprompt - then reset will restore these values and limits even after guess or fit has been called.

Parameters:

• model (optional) – The model component or expression to reset. The default is to use all source expressions.
• id (int or string, optional) – The data set to use. The default is to use all data sets with a source expression.

See also

fit()

Fit one or more data sets.

guess()

Set model parameters to values matching the data.

paramprompt()

Control how parameter values are set.

set_par()

Set the value, limits, or behavior of a model parameter.

Examples

The following examples assume that the source model has been set using:

>>> set_source(powlaw1d.pl * xsphabs.gal)

Fit the model and then reset the values of both components (pl and gal):

>>> fit()
>>> reset()

Reset just the parameters of the pl model component:

>>> reset(pl)

Reset all the components of the source expression for data set 2.

>>> reset(get_source(2))