cle.

            Note: Markers specified through this parameter (e.g. 'x') will be
            silently ignored (unless using ``use_line_collection=False``).
            Instead, markers should be specified using *markerfmt*.

        markerfmt : str, optional
            A string defining the color and/or shape of the markers at the stem
            heads. If the marker is not given, use the marker 'o', i.e. filled
            circles. If the color is not given, use the color from *linefmt*.

        basefmt : str, default: 'C3-' ('C2-' in classic mode)
            A format string defining the properties of the baseline.

        orientation : {'vertical', 'horizontal'}, default: 'vertical'
            If 'vertical', will produce a plot with stems oriented vertically,
            If 'horizontal', the stems will be oriented horizontally.

        bottom : float, default: 0
            The y/x-position of the baseline (depending on orientation).

        label : str, default: None
            The label to use for the stems in legends.

        use_line_collection : bool, default: True
            *Deprecated since 3.6*

            If ``True``, store and plot the stem lines as a
            `~.collections.LineCollection` instead of individual lines, which
            significantly increases performance.  If ``False``, defaults to the
            old behavior of using a list of `.Line2D` objects.

        data : indexable object, optional
            DATA_PARAMETER_PLACEHOLDER

        Returns
        -------
        `.StemContainer`
            The container may be treated like a tuple
            (*markerline*, *stemlines*, *baseline*)

        Notes
        -----
        .. seealso::
            The MATLAB function
            `stem <https://www.mathworks.com/help/matlab/ref/stem.html>`_
            which inspired this method.
        rl