filter2.vl

{
    "transform": [
        {
            "groupby": [
                "Director"
            ],
            "aggregate": [
                {
                    "op": "mean",
                    "as": "aggregateGross",
                    "field": "Worldwide_Gross"
                }
            ]
        },
        {
            "window": [
                {
                    "op": "row_number",
                    "as": "rank"
                }
            ],
            "sort": [
                {
                    "field": "aggregateGross",
                    "order": "descending"
                }
            ]
        },
        {
            "as": "rankedDirector",
            "calculate": "datum.rank < 10 ? datum.Director : 'All Others'"
        }
    ],
    "mark": "bar",
    "data": {
        "url": "https://vega.github.io/vega-lite/data/movies.json"
    },
    "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
    "title": "Top Directors by Average Worldwide Gross",
    "encoding": {
        "x": {
            "field": "aggregateGross",
            "aggregate": "mean",
            "title": null,
            "type": "quantitative"
        },
        "y": {
            "field": "rankedDirector",
            "sort": {
                "encoding": "x",
                "order": "descending"
            },
            "title": null,
            "type": "ordinal"
        }
    },
    "description": "Top-k items with 'others'"
}