Simple Vega-Lite plot

movies-hconcat.json

{
    "$schema": "https://vega.github.io/schema/vega-lite/v2.json",
    "description": "Messing around!",
    "data": {
        "url": "data/movies.json"
    },
    "transform": [
        {"filter": "datum.MPAA_Rating != null"}
    ],
    "hconcat": [
        {
            "mark": "bar",
            "encoding": {
                "x": {
                    "field": "MPAA_Rating",
                    "type": "ordinal"
                },
                "y": {
                    "aggregate": "count",
                    "type": "quantitative"
                }
            }
        },
        {
            "mark": "bar",
            "encoding": {
                "x": {
                    "field": "IMDB_Rating",
                    "type": "quantitative",
                    "bin": true
                },
                "y": {
                    "aggregate": "count",
                    "type": "quantitative"
                }
            }
        }
    ]
}