Table Binned heatmap

{
  "$schema": "https://vega.github.io/schema/vega-lite/v2.json",
  "data": {"url": "data/movies.json"},
  "mark": "rect",
  "width": 300,
  "height": 200,
  "encoding": {
    "x": {
      "bin": {"maxbins":60},
      "field": "IMDB_Rating",
      "type": "quantitative"
    },
    "y": {
      "bin": {"maxbins": 40},
      "field": "Rotten_Tomatoes_Rating",
      "type": "quantitative"
    },
    "color": {
      "aggregate": "count",
      "type": "quantitative"
    }
  },
  "config": {
    "range": {
      "heatmap": {
        "scheme": "greenblue"
      }
    },
    "view": {
      "stroke": "transparent"
    }
  }
}