{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "background": "white",
  "padding": 5,
  "width": 200,
  "data": [
    {"name": "region_store"},
    {"name": "source_0", "url": "data/cars.json", "format": {"type": "json"}},
    {
      "name": "data_0",
      "source": "source_0",
      "transform": [
        {
          "type": "filter",
          "expr": "isValid(datum[\"Horsepower\"]) && isFinite(+datum[\"Horsepower\"]) && isValid(datum[\"Miles_per_Gallon\"]) && isFinite(+datum[\"Miles_per_Gallon\"])"
        }
      ]
    },
    {
      "name": "data_1",
      "source": "source_0",
      "transform": [
        {
          "type": "filter",
          "expr": "isValid(datum[\"Horsepower\"]) && isFinite(+datum[\"Horsepower\"]) && isValid(datum[\"Acceleration\"]) && isFinite(+datum[\"Acceleration\"])"
        }
      ]
    }
  ],
  "signals": [
    {"name": "childHeight", "value": 200},
    {
      "name": "unit",
      "value": {},
      "on": [
        {"events": "mousemove", "update": "isTuple(group()) ? group() : unit"}
      ]
    },
    {
      "name": "region",
      "update": "{\"Horsepower\": region_Horsepower, \"Miles_per_Gallon\": region_Miles_per_Gallon}"
    },
    {"name": "region_Horsepower"},
    {"name": "region_Miles_per_Gallon"}
  ],
  "layout": {"padding": 20, "columns": 1, "bounds": "full", "align": "each"},
  "marks": [
    {
      "type": "group",
      "name": "concat_0_group",
      "style": "cell",
      "encode": {
        "update": {
          "width": {"signal": "width"},
          "height": {"signal": "childHeight"}
        }
      },
      "signals": [
        {
          "name": "region_Horsepower",
          "on": [
            {
              "events": [{"source": "view", "type": "dblclick"}],
              "update": "null"
            },
            {
              "events": {"signal": "region_translate_delta"},
              "update": "panLinear(region_translate_anchor.extent_x, -region_translate_delta.x / width)"
            },
            {
              "events": {"signal": "region_zoom_delta"},
              "update": "zoomLinear(domain(\"x\"), region_zoom_anchor.x, region_zoom_delta)"
            }
          ],
          "push": "outer"
        },
        {
          "name": "region_Miles_per_Gallon",
          "on": [
            {
              "events": [{"source": "view", "type": "dblclick"}],
              "update": "null"
            },
            {
              "events": {"signal": "region_translate_delta"},
              "update": "panLinear(region_translate_anchor.extent_y, region_translate_delta.y / childHeight)"
            },
            {
              "events": {"signal": "region_zoom_delta"},
              "update": "zoomLinear(domain(\"concat_0_y\"), region_zoom_anchor.y, region_zoom_delta)"
            }
          ],
          "push": "outer"
        },
        {
          "name": "region_tuple",
          "on": [
            {
              "events": [
                {"signal": "region_Horsepower || region_Miles_per_Gallon"}
              ],
              "update": "region_Horsepower && region_Miles_per_Gallon ? {unit: \"concat_0\", fields: region_tuple_fields, values: [region_Horsepower,region_Miles_per_Gallon]} : null"
            }
          ]
        },
        {
          "name": "region_tuple_fields",
          "value": [
            {"field": "Horsepower", "channel": "x", "type": "R"},
            {"field": "Miles_per_Gallon", "channel": "y", "type": "R"}
          ]
        },
        {
          "name": "region_translate_anchor",
          "value": {},
          "on": [
            {
              "events": [{"source": "scope", "type": "mousedown"}],
              "update": "{x: x(unit), y: y(unit), extent_x: domain(\"x\"), extent_y: domain(\"concat_0_y\")}"
            }
          ]
        },
        {
          "name": "region_translate_delta",
          "value": {},
          "on": [
            {
              "events": [
                {
                  "source": "window",
                  "type": "mousemove",
                  "consume": true,
                  "between": [
                    {"source": "scope", "type": "mousedown"},
                    {"source": "window", "type": "mouseup"}
                  ]
                }
              ],
              "update": "{x: region_translate_anchor.x - x(unit), y: region_translate_anchor.y - y(unit)}"
            }
          ]
        },
        {
          "name": "region_zoom_anchor",
          "on": [
            {
              "events": [{"source": "scope", "type": "wheel", "consume": true}],
              "update": "{x: invert(\"x\", x(unit)), y: invert(\"concat_0_y\", y(unit))}"
            }
          ]
        },
        {
          "name": "region_zoom_delta",
          "on": [
            {
              "events": [{"source": "scope", "type": "wheel", "consume": true}],
              "force": true,
              "update": "pow(1.001, event.deltaY * pow(16, event.deltaMode))"
            }
          ]
        },
        {
          "name": "region_modify",
          "on": [
            {
              "events": {"signal": "region_tuple"},
              "update": "modify(\"region_store\", region_tuple, true)"
            }
          ]
        }
      ],
      "marks": [
        {
          "name": "concat_0_marks",
          "type": "symbol",
          "clip": true,
          "style": ["point"],
          "interactive": true,
          "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\"], \"\")) + \"; Miles_per_Gallon: \" + (format(datum[\"Miles_per_Gallon\"], \"\"))"
              },
              "x": {"scale": "x", "field": "Horsepower"},
              "y": {"scale": "concat_0_y", "field": "Miles_per_Gallon"}
            }
          }
        }
      ],
      "axes": [
        {
          "scale": "x",
          "orient": "bottom",
          "gridScale": "concat_0_y",
          "grid": true,
          "tickCount": {"signal": "ceil(width/40)"},
          "domain": false,
          "labels": false,
          "aria": false,
          "maxExtent": 0,
          "minExtent": 0,
          "ticks": false,
          "zindex": 0
        },
        {
          "scale": "concat_0_y",
          "orient": "left",
          "gridScale": "x",
          "grid": true,
          "tickCount": {"signal": "ceil(childHeight/40)"},
          "domain": false,
          "labels": false,
          "aria": false,
          "maxExtent": 0,
          "minExtent": 0,
          "ticks": false,
          "zindex": 0
        },
        {
          "scale": "x",
          "orient": "bottom",
          "grid": false,
          "title": "Horsepower",
          "labelFlush": true,
          "labelOverlap": true,
          "tickCount": {"signal": "ceil(width/40)"},
          "zindex": 0
        },
        {
          "scale": "concat_0_y",
          "orient": "left",
          "grid": false,
          "title": "Miles_per_Gallon",
          "labelOverlap": true,
          "tickCount": {"signal": "ceil(childHeight/40)"},
          "zindex": 0
        }
      ]
    },
    {
      "type": "group",
      "name": "concat_1_group",
      "style": "cell",
      "encode": {
        "update": {
          "width": {"signal": "width"},
          "height": {"signal": "childHeight"}
        }
      },
      "marks": [
        {
          "name": "concat_1_marks",
          "type": "symbol",
          "clip": true,
          "style": ["point"],
          "interactive": false,
          "from": {"data": "data_1"},
          "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\"], \"\"))"
              },
              "x": {"scale": "x", "field": "Horsepower"},
              "y": {"scale": "concat_1_y", "field": "Acceleration"}
            }
          }
        }
      ],
      "axes": [
        {
          "scale": "x",
          "orient": "bottom",
          "gridScale": "concat_1_y",
          "grid": true,
          "tickCount": {"signal": "ceil(width/40)"},
          "domain": false,
          "labels": false,
          "aria": false,
          "maxExtent": 0,
          "minExtent": 0,
          "ticks": false,
          "zindex": 0
        },
        {
          "scale": "concat_1_y",
          "orient": "left",
          "gridScale": "x",
          "grid": true,
          "tickCount": {"signal": "ceil(childHeight/40)"},
          "domain": false,
          "labels": false,
          "aria": false,
          "maxExtent": 0,
          "minExtent": 0,
          "ticks": false,
          "zindex": 0
        },
        {
          "scale": "x",
          "orient": "bottom",
          "grid": false,
          "title": "Horsepower",
          "labelFlush": true,
          "labelOverlap": true,
          "tickCount": {"signal": "ceil(width/40)"},
          "zindex": 0
        },
        {
          "scale": "concat_1_y",
          "orient": "left",
          "grid": false,
          "title": "Acceleration",
          "labelOverlap": true,
          "tickCount": {"signal": "ceil(childHeight/40)"},
          "zindex": 0
        }
      ]
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "linear",
      "domain": {
        "fields": [
          {"data": "data_0", "field": "Horsepower"},
          {"data": "data_1", "field": "Horsepower"}
        ]
      },
      "domainRaw": {"signal": "region[\"Horsepower\"]"},
      "range": [0, {"signal": "width"}],
      "nice": true,
      "zero": true
    },
    {
      "name": "concat_0_y",
      "type": "linear",
      "domain": {"data": "data_0", "field": "Miles_per_Gallon"},
      "domainRaw": {"signal": "region[\"Miles_per_Gallon\"]"},
      "range": [{"signal": "childHeight"}, 0],
      "nice": true,
      "zero": true
    },
    {
      "name": "concat_1_y",
      "type": "linear",
      "domain": {"data": "data_1", "field": "Acceleration"},
      "range": [{"signal": "childHeight"}, 0],
      "nice": true,
      "zero": true
    }
  ]
}