Synopsis
Return the number of parameters in a model expression.
Syntax
get_num_par(id=None)
Description
The `get_num_par` function returns the number of parameters, both frozen and thawed, in the model assigned to a data set.
Examples
Example 1
Return the total number of parameters for the default data set:
>>> print(get_num_par())
Example 2
Find the number of parameters for the model associated with the data set called "jet":
>>> njet = get_num_par('jet')PARAMETERS
The parameter for this function is:
| Parameter | Type information | Definition |
|---|---|---|
| id | int, str, or None, optional | The data set containing the model expression. If not given then the default identifier is used, as returned by `get_default_id` . |
Return value
The return value from this function is:
npar -- The number of parameters in the model expression. This sums up all the parameters of the components in the expression, and includes both frozen and thawed components.
Changes in CIAO
Added in CIAO 4.17
Linked components are now included without having to include them in the model expression.
Bugs
See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.
See Also
- confidence
- get_conf, get_conf_results, get_covar, get_covar_opt, get_covar_results, get_covariance_results, get_int_proj, get_int_unc, get_proj, get_proj_opt, get_proj_results, get_projection_results, get_reg_proj, get_reg_unc
- contrib
- get_chart_spectrum, get_marx_spectrum
- data
- get_areascal, get_arf, get_arf_plot, get_axes, get_backscal, get_bkg, get_bkg_arf, get_bkg_chisqr_plot, get_bkg_delchi_plot, get_bkg_fit_plot, get_bkg_model, get_bkg_model_plot, get_bkg_plot, get_bkg_ratio_plot, get_bkg_resid_plot, get_bkg_rmf, get_bkg_scale, get_bkg_source, get_bkg_source_plot, get_coord, get_counts, get_data, get_data_contour, get_data_contour_prefs, get_data_image, get_data_plot, get_data_plot_prefs, get_dep, get_dims, get_error, get_exposure, get_grouping, get_indep, get_quality, get_rmf, get_specresp, get_staterror, get_syserror
- filtering
- get_filter
- fitting
- calc_stat_info, get_stat_info
- info
- get_default_id, list_model_ids, list_stats, show_bkg_model, show_bkg_source
- methods
- get_draws, get_iter_method_name, get_iter_method_opt, get_method, get_method_name, get_method_opt
- modeling
- add_model, add_user_pars, clean, create_model_component, delete_bkg_model, delete_model, delete_model_component, get_model, get_model_autoassign_func, get_model_component, get_model_component_image, get_model_component_plot, get_model_plot, get_num_par_frozen, get_num_par_thawed, get_order_plot, get_par, get_pileup_model, get_response, get_source, get_source_component_image, get_source_component_plot, get_source_contour, get_source_image, get_source_plot, image_model, image_model_component, image_source, image_source_component, integrate, link, load_table_model, load_template_interpolator, load_template_model, load_user_model, normal_sample, reset, save_model, save_source, set_bkg_model, set_bkg_source, set_full_model, set_model, set_model_autoassign_func, set_pileup_model, set_source, t_sample, uniform_sample
- plotting
- get_cdf_plot, get_pdf_plot, get_pvalue_plot, get_pvalue_results, get_split_plot, plot_cdf, plot_model, plot_model_component, plot_pdf, plot_pvalue, plot_scatter, plot_source, plot_source_component, plot_trace
- psfs
- delete_psf, get_psf, get_psf_contour, get_psf_image, get_psf_plot, load_conv
- saving
- save_delchi, save_resid
- statistics
- get_chisqr_plot, get_delchi_plot, get_prior, get_sampler, get_stat, get_stat_name
- utilities
- calc_chisqr, calc_energy_flux, calc_model_sum, calc_photon_flux, calc_source_sum, calc_stat, eqwidth, get_analysis, get_rate
- visualization
- contour_model, contour_ratio, contour_resid, image_getregion