get_model_type¶

sherpa.astro.ui.get_model_type(model)¶

Describe a model expression.

Parameters:	model (str or a sherpa.models.model.Model object) –
Returns:	type – The name of the model expression.
Return type:	str

See also

create_model_component(): Create a model component.
get_model(): Return the model expression for a data set.
get_model_pars(): Return the names of the parameters of a model.
get_source(): Return the source model expression for a data set.

Examples

>>> create_model_component("powlaw1d", "pl")
>>> get_model_type("pl")
'powlaw1d'

For expressions containing more than one component, the result is likely to be ‘binaryopmodel’

>>> get_model_type(const1d.norm * (polynom1d.poly + gauss1d.gline))
'binaryopmodel'

For sources with some form of an instrument model - such as a PSF convolution for an image or a PHA file with response information from the ARF and RMF - the response can depend on whether the expression contains this extra information or not:

>>> get_model_type(get_source('spec'))
'binaryopmodel'
>>> get_model_type(get_model('spec'))
'rspmodelpha'