Return the data used by plot_data.

Parameters:id (int or str, optional) – The data set that provides the data. If not given then the default identifier is used, as returned by get_default_id.
Returns:data – An object representing the data used to create the plot by plot_data. The relationship between the returned values and the values in the data set depend on the data type. For example PHA data are plotted in units controlled by sherpa.astro.ui.set_analysis, but are stored as channels and counts, and may have been grouped and the background estimate removed.
Return type:a sherpa.plot.DataPlot instance

See also

Return the preferences for plot_data.
Return the default data set identifier.
Plot the data values.