{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "background": "white",
  "padding": 5,
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      "source": "source_0",
      "transform": [{"type": "aggregate", "groupby": ["Origin"]}]
    },
    {
      "name": "data_2",
      "source": "source_0",
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        {
          "type": "filter",
          "expr": "isValid(datum[\"Horsepower\"]) && isFinite(+datum[\"Horsepower\"]) && isValid(datum[\"Acceleration\"]) && isFinite(+datum[\"Acceleration\"])"
        }
      ]
    }
  ],
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    {"name": "child_child_width", "value": 200},
    {"name": "child_child_height", "value": 200}
  ],
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    "padding": 20,
    "headerBand": {"row": 0.5},
    "offset": {"rowTitle": 10},
    "columns": 1,
    "bounds": "full",
    "align": "all"
  },
  "marks": [
    {
      "name": "row-title",
      "type": "group",
      "role": "row-title",
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        "text": "Origin / Cylinders",
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      }
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      "name": "row_header",
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      "role": "row-header",
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      "sort": {"field": "datum[\"Origin\"]", "order": "ascending"},
      "title": {
        "text": {
          "signal": "isValid(parent[\"Origin\"]) ? parent[\"Origin\"] : \"\"+parent[\"Origin\"]"
        },
        "orient": "left",
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        {
          "name": "child_row_domain",
          "source": "facet",
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      ],
      "layout": {"padding": 20, "columns": 1, "bounds": "full", "align": "all"},
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          "title": {
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              "signal": "isValid(parent[\"Cylinders\"]) ? parent[\"Cylinders\"] : \"\"+parent[\"Cylinders\"]"
            },
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            {
              "scale": "y",
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              "title": "Acceleration",
              "labelOverlap": true,
              "tickCount": {"signal": "ceil(child_child_height/40)"},
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          ]
        },
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          "name": "child_column_footer",
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            {
              "scale": "x",
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              "title": "Horsepower",
              "labelFlush": true,
              "labelOverlap": true,
              "tickCount": {"signal": "ceil(child_child_width/40)"},
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          ]
        },
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          "name": "child_cell",
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              "name": "child_facet",
              "data": "facet",
              "groupby": ["Cylinders"]
            }
          },
          "sort": {"field": ["datum[\"Cylinders\"]"], "order": ["ascending"]},
          "data": [
            {
              "source": "child_facet",
              "name": "data_0",
              "transform": [
                {
                  "type": "filter",
                  "expr": "isValid(datum[\"Horsepower\"]) && isFinite(+datum[\"Horsepower\"]) && isValid(datum[\"Acceleration\"]) && isFinite(+datum[\"Acceleration\"])"
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              ]
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          ],
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            "update": {
              "width": {"signal": "child_child_width"},
              "height": {"signal": "child_child_height"}
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          },
          "marks": [
            {
              "name": "child_child_marks",
              "type": "symbol",
              "style": ["point"],
              "from": {"data": "data_0"},
              "encode": {
                "update": {
                  "opacity": {"value": 0.7},
                  "fill": {"value": "transparent"},
                  "stroke": {"value": "#4c78a8"},
                  "ariaRoleDescription": {"value": "point"},
                  "description": {
                    "signal": "\"Horsepower: \" + (format(datum[\"Horsepower\"], \"\")) + \"; Acceleration: \" + (format(datum[\"Acceleration\"], \"\"))"
                  },
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                  "y": {"scale": "y", "field": "Acceleration"}
                }
              }
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          ],
          "axes": [
            {
              "scale": "x",
              "orient": "bottom",
              "gridScale": "y",
              "grid": true,
              "tickCount": {"signal": "ceil(child_child_width/40)"},
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              "labels": false,
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              "maxExtent": 0,
              "minExtent": 0,
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            {
              "scale": "y",
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              "tickCount": {"signal": "ceil(child_child_height/40)"},
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              "labels": false,
              "aria": false,
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    {
      "name": "x",
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      "domain": {"data": "data_2", "field": "Horsepower"},
      "range": [0, {"signal": "child_child_width"}],
      "nice": true,
      "zero": true
    },
    {
      "name": "y",
      "type": "linear",
      "domain": {"data": "data_2", "field": "Acceleration"},
      "range": [{"signal": "child_child_height"}, 0],
      "nice": true,
      "zero": true
    }
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}