    Plot the data values.

plot_data(id=None, replot=False, overplot=False, clearwindow=True, **kwargs)
id - int or str, optional
replot - bool, optional
overplot - bool, optional
clearwindow - bool, optional

Plot the data from the default data set:

>>> plot_data()

Plot the data from data set 1:

>>> plot_data(1)

Plot the data from data set labelled "jet" and then overplot the "core" data set. The `set_xlog` command is used to select a logarithmic scale for the X axis.

>>> set_xlog("data") >>> plot_data("jet") >>> plot_data("core", overplot=True)

The following example requires that the Matplotlib backend is selected, and uses a Matplotlib function to create a subplot (in this case one filling the bottom half of the plot area) and then calls `plot_data` with the `clearwindow`

argument set to `False` to use this subplot. If the

`clearwindow` argument had not been used then the plot area would have been cleared and the plot would have filled the area.

>>> plt.subplot(2, 1, 2) >>> plot_data(clearwindow=False)

Additional arguments can be given that are passed to the plot backend: the supported arguments match the keywords of the dictionary returned by `get_data_plot_prefs` . Examples include (for the Matplotlib backend): adding a "cap" to the error bars:

>>> plot_data(capsize=4)

changing the symbol to a square:

>>> plot_data(marker='s')

using a dotted line to connect the points:

>>> plot_data(linestyle='dotted')

and plotting multiple data sets on the same plot, using a log scale for the Y axis, setting the alpha transparency for each plot, and explicitly setting the colors of the last two datasets:

>>> plot_data(ylog=True, alpha=0.7) >>> plot_data(2, overplot=True, alpha=0.7, color='brown') >>> plot_data(3, overplot=True, alpha=0.7, color='purple')

PARAMETERS

The parameters for this function are:

Parameter
Definition
id
The data set that provides the data. If not given then the default identifier is used, as returned by `get_default_id` .
replot
Set to True to use the values calculated by the last call to `plot_data` . The default is False .
overplot
If True then add the data to an existing plot, otherwise create a new plot. The default is False .
clearwindow
Should the existing plot area be cleared before creating this new plot (e.g. for multi-panel plots)?

Notes

The additional arguments supported by `plot_data` are the same as the keywords of the dictionary returned by `get_data_plot_prefs` .

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

December 2023