{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "description": "Though Vega-Lite supports only one scale per axes, one can create a parallel coordinate plot by folding variables, using `joinaggregate` to normalize their values and using ticks and rules to manually create axes.",
  "background": "white",
  "padding": 5,
  "width": 600,
  "height": 300,
  "style": "cell",
  "data": [
    {
      "name": "source_0",
      "url": "data/penguins.json",
      "format": {"type": "json"},
      "transform": [
        {"type": "filter", "expr": "datum['Beak Length (mm)']"},
        {
          "type": "window",
          "params": [null],
          "as": ["index"],
          "ops": ["count"],
          "fields": [null],
          "sort": {"field": [], "order": []}
        },
        {
          "type": "fold",
          "fields": [
            "Beak Length (mm)",
            "Beak Depth (mm)",
            "Flipper Length (mm)",
            "Body Mass (g)"
          ],
          "as": ["key", "value"]
        },
        {
          "type": "joinaggregate",
          "as": ["min", "max"],
          "ops": ["min", "max"],
          "fields": ["value", "value"],
          "groupby": ["key"]
        },
        {
          "type": "formula",
          "expr": "(datum.value - datum.min) / (datum.max-datum.min)",
          "as": "norm_val"
        },
        {"type": "formula", "expr": "(datum.min + datum.max) / 2", "as": "mid"}
      ]
    },
    {
      "name": "data_0",
      "source": "source_0",
      "transform": [
        {
          "type": "aggregate",
          "groupby": ["key"],
          "ops": ["min", "count", "max", "min"],
          "fields": ["min", null, "max", "mid"],
          "as": ["min_min", "__count", "max_max", "min_mid"]
        }
      ]
    }
  ],
  "marks": [
    {
      "name": "layer_0_marks",
      "type": "rule",
      "style": ["rule"],
      "from": {"data": "data_0"},
      "encode": {
        "update": {
          "stroke": {"value": "#ccc"},
          "description": {
            "signal": "\"key: \" + (isValid(datum[\"key\"]) ? datum[\"key\"] : \"\"+datum[\"key\"]) + \"; Count of Records: \" + (format(datum[\"__count\"], \"\"))"
          },
          "x": {"scale": "x", "field": "key", "band": 0.5},
          "y": {"value": 0},
          "y2": {"field": {"group": "height"}}
        }
      }
    },
    {
      "name": "layer_1_pathgroup",
      "type": "group",
      "from": {
        "facet": {
          "name": "faceted_path_layer_1_main",
          "data": "source_0",
          "groupby": ["Species", "index"]
        }
      },
      "encode": {
        "update": {
          "width": {"field": {"group": "width"}},
          "height": {"field": {"group": "height"}}
        }
      },
      "marks": [
        {
          "name": "layer_1_marks",
          "type": "line",
          "style": ["line"],
          "sort": {"field": "datum[\"key\"]"},
          "from": {"data": "faceted_path_layer_1_main"},
          "encode": {
            "update": {
              "stroke": {"scale": "color", "field": "Species"},
              "opacity": {"value": 0.3},
              "tooltip": {
                "signal": "{\"Beak Length (mm)\": format(datum[\"Beak Length (mm)\"], \"\"), \"Beak Depth (mm)\": format(datum[\"Beak Depth (mm)\"], \"\"), \"Flipper Length (mm)\": format(datum[\"Flipper Length (mm)\"], \"\"), \"Body Mass (g)\": format(datum[\"Body Mass (g)\"], \"\")}"
              },
              "description": {
                "signal": "\"key: \" + (isValid(datum[\"key\"]) ? datum[\"key\"] : \"\"+datum[\"key\"]) + \"; norm_val: \" + (format(datum[\"norm_val\"], \"\")) + \"; Species: \" + (isValid(datum[\"Species\"]) ? datum[\"Species\"] : \"\"+datum[\"Species\"]) + \"; index: \" + (isValid(datum[\"index\"]) ? datum[\"index\"] : \"\"+datum[\"index\"]) + \"; Beak Length (mm): \" + (format(datum[\"Beak Length (mm)\"], \"\")) + \"; Beak Depth (mm): \" + (format(datum[\"Beak Depth (mm)\"], \"\")) + \"; Flipper Length (mm): \" + (format(datum[\"Flipper Length (mm)\"], \"\")) + \"; Body Mass (g): \" + (format(datum[\"Body Mass (g)\"], \"\"))"
              },
              "x": {"scale": "x", "field": "key", "band": 0.5},
              "y": {"scale": "y", "field": "norm_val"},
              "defined": {
                "signal": "isValid(datum[\"norm_val\"]) && isFinite(+datum[\"norm_val\"])"
              }
            }
          }
        }
      ]
    },
    {
      "name": "layer_2_layer_0_marks",
      "type": "text",
      "style": ["text", "label"],
      "from": {"data": "data_0"},
      "encode": {
        "update": {
          "fill": {"value": "black"},
          "description": {
            "signal": "\"key: \" + (isValid(datum[\"key\"]) ? datum[\"key\"] : \"\"+datum[\"key\"]) + \"; Max of max: \" + (format(datum[\"max_max\"], \"\"))"
          },
          "x": {"scale": "x", "field": "key", "band": 0.5},
          "y": {"value": 0},
          "text": {"signal": "format(datum[\"max_max\"], \"\")"}
        }
      }
    },
    {
      "name": "layer_2_layer_1_marks",
      "type": "rect",
      "style": ["tick", "tick"],
      "from": {"data": "source_0"},
      "encode": {
        "update": {
          "opacity": {"value": 0.7},
          "fill": {"value": "#ccc"},
          "ariaRoleDescription": {"value": "tick"},
          "description": {
            "signal": "\"key: \" + (isValid(datum[\"key\"]) ? datum[\"key\"] : \"\"+datum[\"key\"])"
          },
          "xc": {"scale": "x", "field": "key", "band": 0.5},
          "yc": {"value": 0},
          "width": {"value": 8},
          "height": {"value": 1}
        }
      }
    },
    {
      "name": "layer_3_layer_0_marks",
      "type": "text",
      "style": ["text", "label"],
      "from": {"data": "data_0"},
      "encode": {
        "update": {
          "fill": {"value": "black"},
          "description": {
            "signal": "\"key: \" + (isValid(datum[\"key\"]) ? datum[\"key\"] : \"\"+datum[\"key\"]) + \"; Min of mid: \" + (format(datum[\"min_mid\"], \"\"))"
          },
          "x": {"scale": "x", "field": "key", "band": 0.5},
          "y": {"value": 150},
          "text": {"signal": "format(datum[\"min_mid\"], \"\")"}
        }
      }
    },
    {
      "name": "layer_3_layer_1_marks",
      "type": "rect",
      "style": ["tick", "tick"],
      "from": {"data": "source_0"},
      "encode": {
        "update": {
          "opacity": {"value": 0.7},
          "fill": {"value": "#ccc"},
          "ariaRoleDescription": {"value": "tick"},
          "description": {
            "signal": "\"key: \" + (isValid(datum[\"key\"]) ? datum[\"key\"] : \"\"+datum[\"key\"])"
          },
          "xc": {"scale": "x", "field": "key", "band": 0.5},
          "yc": {"value": 150},
          "width": {"value": 8},
          "height": {"value": 1}
        }
      }
    },
    {
      "name": "layer_4_layer_0_marks",
      "type": "text",
      "style": ["text", "label"],
      "from": {"data": "data_0"},
      "encode": {
        "update": {
          "fill": {"value": "black"},
          "description": {
            "signal": "\"key: \" + (isValid(datum[\"key\"]) ? datum[\"key\"] : \"\"+datum[\"key\"]) + \"; Min of min: \" + (format(datum[\"min_min\"], \"\"))"
          },
          "x": {"scale": "x", "field": "key", "band": 0.5},
          "y": {"value": 300},
          "text": {"signal": "format(datum[\"min_min\"], \"\")"}
        }
      }
    },
    {
      "name": "layer_4_layer_1_marks",
      "type": "rect",
      "style": ["tick", "tick"],
      "from": {"data": "source_0"},
      "encode": {
        "update": {
          "opacity": {"value": 0.7},
          "fill": {"value": "#ccc"},
          "ariaRoleDescription": {"value": "tick"},
          "description": {
            "signal": "\"key: \" + (isValid(datum[\"key\"]) ? datum[\"key\"] : \"\"+datum[\"key\"])"
          },
          "xc": {"scale": "x", "field": "key", "band": 0.5},
          "yc": {"value": 300},
          "width": {"value": 8},
          "height": {"value": 1}
        }
      }
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "band",
      "domain": {
        "fields": [
          {"data": "data_0", "field": "key"},
          {"data": "source_0", "field": "key"}
        ],
        "sort": true
      },
      "range": [0, {"signal": "width"}],
      "paddingInner": 0,
      "paddingOuter": 0
    },
    {
      "name": "y",
      "type": "linear",
      "domain": {"data": "source_0", "field": "norm_val"},
      "range": [{"signal": "height"}, 0],
      "nice": true,
      "zero": true
    },
    {
      "name": "color",
      "type": "ordinal",
      "domain": {"data": "source_0", "field": "Species", "sort": true},
      "range": "category"
    }
  ],
  "axes": [
    {
      "scale": "x",
      "orient": "bottom",
      "grid": false,
      "labelBaseline": "top",
      "zindex": 0
    }
  ],
  "legends": [
    {
      "stroke": "color",
      "symbolType": "stroke",
      "title": "Species",
      "encode": {"symbols": {"update": {"opacity": {"value": 0.3}}}}
    }
  ],
  "config": {
    "axisX": {
      "domain": false,
      "labelAngle": 0,
      "tickColor": "#ccc",
      "title": null
    },
    "style": {
      "label": {"baseline": "middle", "align": "right", "dx": -5},
      "tick": {"orient": "horizontal"},
      "cell": {"stroke": null}
    }
  }
}