{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "background": "white",
  "padding": 5,
  "data": [
    {
      "name": "source_0",
      "url": "https://cdn.jsdelivr.net/npm/vega-datasets@v1.29.0/data/iris.json",
      "format": {"type": "json"},
      "transform": [
        {
          "type": "fold",
          "fields": ["petalWidth", "petalLength", "sepalWidth", "sepalLength"],
          "as": ["Measurement_type", "value"]
        },
        {
          "type": "kde",
          "field": "value",
          "bandwidth": 0.3,
          "extent": [0, 8],
          "groupby": ["Measurement_type"],
          "as": ["value", "density"]
        }
      ]
    },
    {
      "name": "row_domain",
      "source": "source_0",
      "transform": [{"type": "aggregate", "groupby": ["Measurement_type"]}]
    }
  ],
  "signals": [
    {"name": "child_width", "value": 300},
    {"name": "child_height", "value": 50}
  ],
  "layout": {
    "padding": 20,
    "offset": {"rowTitle": 10},
    "columns": 1,
    "bounds": "full",
    "align": "all"
  },
  "marks": [
    {
      "name": "row-title",
      "type": "group",
      "role": "row-title",
      "title": {
        "text": "Measurement_type",
        "orient": "left",
        "style": "guide-title",
        "offset": 10
      }
    },
    {
      "name": "row_header",
      "type": "group",
      "role": "row-header",
      "from": {"data": "row_domain"},
      "sort": {"field": "datum[\"Measurement_type\"]", "order": "ascending"},
      "title": {
        "text": {
          "signal": "isValid(parent[\"Measurement_type\"]) ? parent[\"Measurement_type\"] : \"\"+parent[\"Measurement_type\"]"
        },
        "orient": "left",
        "style": "guide-label",
        "frame": "group",
        "offset": 10
      },
      "encode": {"update": {"height": {"signal": "child_height"}}},
      "axes": [
        {
          "scale": "y",
          "orient": "left",
          "grid": false,
          "title": "density",
          "labelOverlap": true,
          "tickCount": {"signal": "ceil(child_height/40)"},
          "zindex": 0
        }
      ]
    },
    {
      "name": "column_footer",
      "type": "group",
      "role": "column-footer",
      "encode": {"update": {"width": {"signal": "child_width"}}},
      "axes": [
        {
          "scale": "x",
          "orient": "bottom",
          "grid": false,
          "title": "value",
          "labelFlush": true,
          "labelOverlap": true,
          "tickCount": {"signal": "ceil(child_width/40)"},
          "zindex": 0
        }
      ]
    },
    {
      "name": "cell",
      "type": "group",
      "style": "cell",
      "from": {
        "facet": {
          "name": "facet",
          "data": "source_0",
          "groupby": ["Measurement_type"]
        }
      },
      "sort": {
        "field": ["datum[\"Measurement_type\"]"],
        "order": ["ascending"]
      },
      "encode": {
        "update": {
          "width": {"signal": "child_width"},
          "height": {"signal": "child_height"}
        }
      },
      "marks": [
        {
          "name": "child_marks",
          "type": "area",
          "style": ["area"],
          "sort": {"field": "datum[\"value\"]"},
          "from": {"data": "facet"},
          "encode": {
            "update": {
              "orient": {"value": "vertical"},
              "fill": {"value": "#4c78a8"},
              "description": {
                "signal": "\"value: \" + (format(datum[\"value\"], \"\")) + \"; density: \" + (format(datum[\"density\"], \"\"))"
              },
              "x": {"scale": "x", "field": "value"},
              "y": {"scale": "y", "field": "density"},
              "y2": {"scale": "y", "value": 0},
              "defined": {
                "signal": "isValid(datum[\"value\"]) && isFinite(+datum[\"value\"]) && isValid(datum[\"density\"]) && isFinite(+datum[\"density\"])"
              }
            }
          }
        }
      ],
      "axes": [
        {
          "scale": "x",
          "orient": "bottom",
          "gridScale": "y",
          "grid": true,
          "tickCount": {"signal": "ceil(child_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(child_height/40)"},
          "domain": false,
          "labels": false,
          "aria": false,
          "maxExtent": 0,
          "minExtent": 0,
          "ticks": false,
          "zindex": 0
        }
      ]
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "linear",
      "domain": {"data": "source_0", "field": "value"},
      "range": [0, {"signal": "child_width"}],
      "nice": true,
      "zero": false
    },
    {
      "name": "y",
      "type": "linear",
      "domain": {"data": "source_0", "field": "density"},
      "range": [{"signal": "child_height"}, 0],
      "nice": true,
      "zero": true
    }
  ]
}