table3.vl

{
    "transform": [
        {
            "filter": {
                "and": [
                    {
                        "field": "IMDB_Rating",
                        "valid": true
                    },
                    {
                        "field": "Rotten_Tomatoes_Rating",
                        "valid": true
                    }
                ]
            }
        }
    ],
    "height": 200,
    "config": {
        "range": {
            "heatmap": {
                "scheme": "greenblue"
            }
        },
        "view": {
            "stroke": null
        }
    },
    "mark": "rect",
    "data": {
        "url": "https://vega.github.io/vega-lite/data/movies.json"
    },
    "width": 300,
    "$schema": "https://vega.github.io/schema/vega-lite/v3.json",
    "encoding": {
        "color": {
            "aggregate": "count",
            "type": "quantitative"
        },
        "x": {
            "field": "IMDB_Rating",
            "bin": {
                "maxbins": 60
            },
            "type": "quantitative"
        },
        "y": {
            "field": "Rotten_Tomatoes_Rating",
            "bin": {
                "maxbins": 40
            },
            "type": "quantitative"
        }
    },
    "description": "'Binned heatmap' comparing movie ratings."
}