get_data¶

sherpa.astro.ui.get_data(id=None)¶

Return the data set by identifier.

The object returned by the call can be used to query and change properties of the data set.

Parameters:	id (int or str, optional) – The data set. If not given then the default identifier is used, as returned by get_default_id.
Returns:	An instance of a sherpa.Data.Data-derived class.
Return type:	instance
Raises:	`sherpa.utils.err.IdentifierErr` – If no model expression has been set for the data set (with set_model or set_source).

See also

copy_data(): Copy a data set to a new identifier.
delete_data(): Delete a data set by identifier.
load_data(): Create a data set from a file.
set_data(): Set a data set.

Examples

>>> d = get_data()

>>> dimg = get_data('img')

>>> load_arrays('tst', [10, 20, 30], [5.4, 2.3, 9.8])
>>> print(get_data('tst'))
name      =
x         = Int64[3]
y         = Float64[3]
staterror = None
syserror  = None