Heat map

{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.json",
  "data": {"name": "dataset"},
  "spacing": 30,
  "bounds": "flush",
  "vconcat": [
    {
      "mark": {
        "type": "rect",
        "stroke": "white",
        "tooltip": true,
        "cornerRadius": 6
      },
      "encoding": {
        "y": {
          "field": "Day of Week",
          "type": "ordinal",
          "sort": ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"],
          "axis": {"labelColor": "white", "title": null}
        },
        "x": {
          "field": "Month",
          "type": "ordinal",
          "sort": ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
          "axis": {"labelColor": "white", "title": null}
        },
        "color": {"field": "_Track", "type": "quantitative", "scale": {"scheme": "pbiColorLinear"}}
      },
      "height": 150,
      "width": 310
    },
    {
      "height": 50,
      "width": 310,
      "mark": {
        "type": "bar",
        "stroke": null,
        "cornerRadiusEnd": 4,
        "tooltip": true,
        "color": {"expr": "pbiColor(5)"}
      },
      "encoding": {
        "x": {
          "field": "Month",
          "sort": ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
          "axis": {"labelColor": "white", "title": null}
        },
        "y": {"field": "_Track", "aggregate": "mean", "axis": {"labelColor": "white", "title": null}}
      }
    }
  ]
}