{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "description": "A trellis scatterplot showing Horsepower and Miles per gallons, faceted by binned values of Acceleration.",
  "background": "white",
  "padding": 5,
  "data": [
    {
      "name": "source_0",
      "url": "data/cars.json",
      "format": {"type": "json"},
      "transform": [
        {
          "type": "extent",
          "field": "Acceleration",
          "signal": "bin_maxbins_6_Acceleration_extent"
        },
        {
          "type": "bin",
          "field": "Acceleration",
          "as": [
            "bin_maxbins_6_Acceleration",
            "bin_maxbins_6_Acceleration_end"
          ],
          "signal": "bin_maxbins_6_Acceleration_bins",
          "extent": {"signal": "bin_maxbins_6_Acceleration_extent"},
          "maxbins": 6
        },
        {
          "type": "filter",
          "expr": "isValid(datum[\"Horsepower\"]) && isFinite(+datum[\"Horsepower\"]) && isValid(datum[\"Miles_per_Gallon\"]) && isFinite(+datum[\"Miles_per_Gallon\"])"
        }
      ]
    },
    {
      "name": "row_domain",
      "source": "source_0",
      "transform": [
        {
          "type": "aggregate",
          "groupby": [
            "bin_maxbins_6_Acceleration",
            "bin_maxbins_6_Acceleration_end"
          ]
        }
      ]
    }
  ],
  "signals": [
    {"name": "child_width", "value": 200},
    {"name": "child_height", "value": 200}
  ],
  "layout": {
    "padding": 20,
    "offset": {"rowTitle": 10},
    "columns": 1,
    "bounds": "full",
    "align": "all"
  },
  "marks": [
    {
      "name": "row-title",
      "type": "group",
      "role": "row-title",
      "title": {
        "text": "Acceleration (binned)",
        "orient": "left",
        "style": "guide-title",
        "offset": 10
      }
    },
    {
      "name": "row_header",
      "type": "group",
      "role": "row-header",
      "from": {"data": "row_domain"},
      "sort": {
        "field": "datum[\"bin_maxbins_6_Acceleration\"]",
        "order": "ascending"
      },
      "title": {
        "text": {
          "signal": "!isValid(parent[\"bin_maxbins_6_Acceleration\"]) || !isFinite(+parent[\"bin_maxbins_6_Acceleration\"]) ? \"null\" : format(parent[\"bin_maxbins_6_Acceleration\"], \"\") + \" – \" + format(parent[\"bin_maxbins_6_Acceleration_end\"], \"\")"
        },
        "orient": "left",
        "style": "guide-label",
        "frame": "group",
        "offset": 10
      },
      "encode": {"update": {"height": {"signal": "child_height"}}},
      "axes": [
        {
          "scale": "y",
          "orient": "left",
          "grid": false,
          "title": "Miles_per_Gallon",
          "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": "Horsepower",
          "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": [
            "bin_maxbins_6_Acceleration",
            "bin_maxbins_6_Acceleration_end"
          ]
        }
      },
      "sort": {
        "field": ["datum[\"bin_maxbins_6_Acceleration\"]"],
        "order": ["ascending"]
      },
      "encode": {
        "update": {
          "width": {"signal": "child_width"},
          "height": {"signal": "child_height"}
        }
      },
      "marks": [
        {
          "name": "child_marks",
          "type": "symbol",
          "style": ["point"],
          "from": {"data": "facet"},
          "encode": {
            "update": {
              "opacity": {"value": 0.7},
              "fill": {"value": "transparent"},
              "stroke": {"value": "#4c78a8"},
              "ariaRoleDescription": {"value": "point"},
              "description": {
                "signal": "\"Horsepower: \" + (format(datum[\"Horsepower\"], \"\")) + \"; Miles_per_Gallon: \" + (format(datum[\"Miles_per_Gallon\"], \"\"))"
              },
              "x": {"scale": "x", "field": "Horsepower"},
              "y": {"scale": "y", "field": "Miles_per_Gallon"}
            }
          }
        }
      ],
      "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": "Horsepower"},
      "range": [0, {"signal": "child_width"}],
      "nice": true,
      "zero": true
    },
    {
      "name": "y",
      "type": "linear",
      "domain": {"data": "source_0", "field": "Miles_per_Gallon"},
      "range": [{"signal": "child_height"}, 0],
      "nice": true,
      "zero": true
    }
  ]
}