unsubtract

Synopsis

Undo background subtraction

unsubtract( id )

Description

The unsubtract command undoes the background subtraction to restore the input source dataset amplitudes.

• id - the id of the dataset to unsubtract; if not given, uses the default dataset id (id=1 by default, see "ahelp get_default_id")

The "subtracted" field of the source dataset is updated to indicate that the data are not background-subtracted, as shown in the examples.

To background-subtract a dataset, use the subtract command ("ahelp subtract").

Example 1

sherpa> unsubtract()

Undo the background subtraction of the default dataset.

Example 2

sherpa> unsubtract("src")
sherpa> get_data("src").subtracted
False

Undo the background subtraction of the dataset "src". The "subtracted" field of the source data object is updated to show that the dataset is not background-subtracted.

Bugs

See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.

See Also

data

get_bkg, set_bkg, subtract

info

list_bkg_ids, show_bkg_model, show_bkg_source

modeling

delete_bkg_model

plotting

plot_bkg