Barx-Timeline

For a richer example, we'll use some sample data from ancient civilizations.

Below: a barX mark specifies x1 and x2 channels to show civilization timespans, with a text mark providing labels that align with the bars. Both marks use the civilization name for the y channel. Color is used to indicate the continent, and a legend is provided.

(
    Plot.barX(
        civilizations,
        {
            "x1": "start",
            "x2": "end",
            "y": "name",
            "fill": "continent",
            "sort": {"y": "x1"},
        },
    )
    + Plot.text(
        civilizations,
        {"text": "name", "x": "start", "y": "name", "textAnchor": "end", "dx": -3},
    )
    + {"axis": None, "marginLeft": 100}
    + Plot.colorLegend()
)