{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "background": "white",
  "padding": 5,
  "width": 400,
  "height": 100,
  "style": "cell",
  "data": [
    {
      "name": "source_0",
      "url": "data/cars.json",
      "format": {"type": "json"},
      "transform": [
        {
          "type": "fold",
          "fields": ["Displacement", "Horsepower"],
          "as": ["Measurement", "value"]
        },
        {
          "type": "kde",
          "field": "value",
          "bandwidth": 10,
          "groupby": ["Measurement"],
          "extent": [10, 500],
          "counts": true,
          "steps": 200,
          "as": ["value", "density"]
        },
        {
          "type": "impute",
          "field": "density",
          "groupby": ["Measurement"],
          "key": "value",
          "method": "value",
          "value": 0
        },
        {
          "type": "stack",
          "groupby": ["value"],
          "field": "density",
          "sort": {"field": ["Measurement"], "order": ["descending"]},
          "as": ["density_start", "density_end"],
          "offset": "zero"
        }
      ]
    }
  ],
  "marks": [
    {
      "name": "pathgroup",
      "type": "group",
      "from": {
        "facet": {
          "name": "faceted_path_main",
          "data": "source_0",
          "groupby": ["Measurement"]
        }
      },
      "encode": {
        "update": {
          "width": {"field": {"group": "width"}},
          "height": {"field": {"group": "height"}}
        }
      },
      "marks": [
        {
          "name": "marks",
          "type": "area",
          "style": ["area"],
          "sort": {"field": "datum[\"value\"]"},
          "from": {"data": "faceted_path_main"},
          "encode": {
            "update": {
              "orient": {"value": "vertical"},
              "fill": {"scale": "color", "field": "Measurement"},
              "description": {
                "signal": "\"value: \" + (format(datum[\"value\"], \"\")) + \"; density: \" + (format(datum[\"density\"], \"\")) + \"; Measurement: \" + (isValid(datum[\"Measurement\"]) ? datum[\"Measurement\"] : \"\"+datum[\"Measurement\"])"
              },
              "x": {"scale": "x", "field": "value"},
              "y": {"scale": "y", "field": "density_end"},
              "y2": {"scale": "y", "field": "density_start"},
              "defined": {
                "signal": "isValid(datum[\"value\"]) && isFinite(+datum[\"value\"]) && isValid(datum[\"density\"]) && isFinite(+datum[\"density\"])"
              }
            }
          }
        }
      ]
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "linear",
      "domain": {"data": "source_0", "field": "value"},
      "range": [0, {"signal": "width"}],
      "nice": true,
      "zero": false
    },
    {
      "name": "y",
      "type": "linear",
      "domain": {
        "data": "source_0",
        "fields": ["density_start", "density_end"]
      },
      "range": [{"signal": "height"}, 0],
      "nice": true,
      "zero": true
    },
    {
      "name": "color",
      "type": "ordinal",
      "domain": {"data": "source_0", "field": "Measurement", "sort": true},
      "range": "category"
    }
  ],
  "axes": [
    {
      "scale": "x",
      "orient": "bottom",
      "gridScale": "y",
      "grid": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "domain": false,
      "labels": false,
      "aria": false,
      "maxExtent": 0,
      "minExtent": 0,
      "ticks": false,
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "gridScale": "x",
      "grid": true,
      "tickCount": {"signal": "ceil(height/40)"},
      "domain": false,
      "labels": false,
      "aria": false,
      "maxExtent": 0,
      "minExtent": 0,
      "ticks": false,
      "zindex": 0
    },
    {
      "scale": "x",
      "orient": "bottom",
      "grid": false,
      "title": "value",
      "labelFlush": true,
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "grid": false,
      "title": "density",
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(height/40)"},
      "zindex": 0
    }
  ],
  "legends": [{"fill": "color", "symbolType": "circle", "title": "Measurement"}]
}