table4.vl

{
    "mark": "circle",
    "data": {
        "url": "https://vega.github.io/vega-lite/data/github.csv"
    },
    "$schema": "https://vega.github.io/schema/vega-lite/v3.json",
    "encoding": {
        "size": {
            "field": "count",
            "aggregate": "sum",
            "type": "quantitative"
        },
        "x": {
            "field": "time",
            "timeUnit": "hours",
            "type": "ordinal"
        },
        "y": {
            "field": "time",
            "timeUnit": "day",
            "type": "ordinal"
        }
    },
    "description": "Table bubble plot in the style of a Github punched card."
}