Method _plot

pandas/plotting/_matplotlib/core.py:1777–1820

(  # type: ignore[override]
        cls,
        ax: Axes,
        x,
        y: np.ndarray,
        style=None,
        column_num=None,
        stacking_id=None,
        is_errorbar: bool = False,
        **kwds,
    )

    # error: Signature of "_plot" incompatible with supertype "MPLPlot"
    @classmethod
    def _plot(  # type: ignore[override]
        cls,
        ax: Axes,
        x,
        y: np.ndarray,
        style=None,
        column_num=None,
        stacking_id=None,
        is_errorbar: bool = False,
        **kwds,
    ):
        if column_num == 0:
            cls._initialize_stacker(ax, stacking_id, len(y))
        y_values = cls._get_stacked_values(ax, stacking_id, y, kwds["label"])

        # need to remove label, because subplots uses mpl legend as it is
        line_kwds = kwds.copy()
        line_kwds.pop("label")
        lines = MPLPlot._plot(ax, x, y_values, style=style, **line_kwds)

        # get data from the line to get coordinates for fill_between
        xdata, y_values = lines[0].get_data(orig=False)

        # unable to use ``_get_stacked_values`` here to get starting point
        if stacking_id is None:
            start = np.zeros(len(y))
        elif (y >= 0).all():
            # TODO #54485
            start = ax._stacker_pos_prior[stacking_id]  # type: ignore[attr-defined]
        elif (y <= 0).all():
            # TODO #54485
            start = ax._stacker_neg_prior[stacking_id]  # type: ignore[attr-defined]
        else:
            start = np.zeros(len(y))

        if "color" not in kwds:
            kwds["color"] = lines[0].get_color()

        rect = ax.fill_between(xdata, start, y_values, **kwds)
        cls._update_stacker(ax, stacking_id, y)

        # LinePlot expects list of artists
        res = [rect]
        return res

    def _post_plot_logic(self, ax: Axes, data) -> None:
        LinePlot._post_plot_logic(self, ax, data)