Synopsis
Set an option for the iterative-fitting scheme.
Syntax
set_iter_method_opt(optname, val) optname - str
Example
Reject any points that are more than 5 sigma away from the best fit model and re-fit.
>>> set_iter_method('sigmarej')
>>> set_iter_method_opt('lrej', 5)
>>> set_iter_method_opt('hrej', 5)
>>> fit()PARAMETERS
The parameters for this function are:
| Parameter | Definition |
|---|---|
| optname | The name of the option to set. The `get_iter_method_opt` routine can be used to find out valid values for this argument. |
| val | The new value for the option. |
Notes
The supported fields for the sigmarej scheme are:
| Item | Definition |
|---|---|
| grow | The number of points adjacent to a rejected point that should also be removed. A value of 0 means that only the discrepant point is removed whereas a value of 1 means that the two adjacent points (one lower and one higher) will also be removed. |
| hrej | The rejection criterion in units of sigma, for data points above the model (it must be >= 0). |
| lrej | The rejection criterion in units of sigma, for data points below the model (it must be >= 0). |
| maxiters | The maximum number of iterations to perform. If this value is 0 then the fit will run until it has converged. |
Bugs
See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.
See Also
- confidence
- set_conf_opt, set_covar_opt, set_proj_opt
- data
- set_areascal, set_arf, set_backscal, set_bkg, set_coord, set_counts, set_data, set_dep, set_exposure, set_grouping, set_quality, set_rmf, set_staterror, set_syserror
- filtering
- set_filter
- fitting
- fit, simulfit
- methods
- get_iter_method_name, get_iter_method_opt, list_iter_methods, set_iter_method, set_method, set_method_opt
- modeling
- get_par, get_xsabund, get_xscosmo, get_xsxsect, get_xsxset, set_bkg_model, set_bkg_source, set_full_model, set_model, set_par, set_pileup_model, set_source, set_xsabund, set_xscosmo, set_xsxsect, set_xsxset
- plotting
- plot_fit, plot_fit_delchi, plot_fit_resid
- statistics
- get_stat, get_stat_name, set_prior, set_sampler, set_sampler_opt, set_stat
- utilities
- calc_chisqr, calc_stat, set_analysis, set_default_id
- visualization
- contour_resid, image_fit, image_setregion