get_num_par_frozen¶
-
sherpa.ui.
get_num_par_frozen
(id=None)¶ Return the number of frozen parameters in a model expression.
The get_num_par_frozen function returns the number of frozen parameters in the model assigned to a data set.
- Parameters
id (int or str, optional) – The data set containing the model expression. If not given then the default identifier is used, as returned by get_default_id.
- Returns
npar – The number of parameters in the model expression. This sums up all the frozen parameters of the components in the expression.
- Return type
int
- Raises
sherpa.utils.err.IdentifierErr – If no model expression has been set for the data set (with set_model or set_source).
See also
get_num_par
Return the number of parameters.
get_num_par_thawed
Return the number of thawed parameters.
set_model
Set the source model expression for a data set.
Examples
Return the number of frozen parameters for the default data set:
>>> print(get_num_par_frozen())
Find the number of frozen parameters for the model associated with the data set called “jet”:
>>> njet = get_num_par_frozen('jet')