{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "background": "white",
  "padding": 5,
  "width": 200,
  "height": 200,
  "style": "cell",
  "data": [
    {
      "name": "df",
      "values": [
        {"x": 1, "y": 1, "y2": 2},
        {"x": 2, "y": 2, "y2": 3},
        {"x": 3, "y": 3, "y2": 4}
      ],
      "format": {}
    },
    {
      "name": "data_0",
      "source": "df",
      "transform": [
        {"type": "formula", "expr": "toNumber(datum[\"x\"])", "as": "x"}
      ]
    }
  ],
  "marks": [
    {
      "name": "layer_0_marks",
      "type": "line",
      "clip": true,
      "style": ["line"],
      "sort": {"field": "datum[\"x\"]"},
      "from": {"data": "data_0"},
      "encode": {
        "update": {
          "tooltip": {
            "signal": "{\"x\": format(datum[\"x\"], \"\"), \"y\": format(datum[\"y\"], \"\")}"
          },
          "stroke": {"scale": "color", "value": "Line 1"},
          "description": {
            "signal": "\"x: \" + (format(datum[\"x\"], \"\")) + \"; y: \" + (format(datum[\"y\"], \"\"))"
          },
          "x": {"scale": "x", "field": "x"},
          "y": {"scale": "y", "field": "y"},
          "defined": {
            "signal": "isValid(datum[\"x\"]) && isFinite(+datum[\"x\"]) && isValid(datum[\"y\"]) && isFinite(+datum[\"y\"])"
          }
        }
      }
    },
    {
      "name": "layer_1_marks",
      "type": "line",
      "clip": true,
      "style": ["line"],
      "sort": {"field": "datum[\"x\"]"},
      "from": {"data": "data_0"},
      "encode": {
        "update": {
          "tooltip": {
            "signal": "{\"x\": format(datum[\"x\"], \"\"), \"y2\": format(datum[\"y2\"], \"\")}"
          },
          "stroke": {"value": "#4c78a8"},
          "description": {
            "signal": "\"x: \" + (format(datum[\"x\"], \"\")) + \"; y2: \" + (format(datum[\"y2\"], \"\"))"
          },
          "x": {"scale": "x", "field": "x"},
          "y": {"scale": "y", "field": "y2"},
          "defined": {
            "signal": "isValid(datum[\"x\"]) && isFinite(+datum[\"x\"]) && isValid(datum[\"y2\"]) && isFinite(+datum[\"y2\"])"
          }
        }
      }
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "linear",
      "domain": {"data": "data_0", "field": "x"},
      "range": [0, {"signal": "width"}],
      "nice": true,
      "zero": false
    },
    {
      "name": "y",
      "type": "linear",
      "domain": {"data": "data_0", "fields": ["y", "y2"]},
      "range": [{"signal": "height"}, 0],
      "nice": true,
      "zero": true
    },
    {
      "name": "color",
      "type": "ordinal",
      "domain": ["Line 1"],
      "range": "category"
    }
  ],
  "axes": [
    {
      "scale": "x",
      "orient": "bottom",
      "gridScale": "y",
      "grid": true,
      "tickCount": {"signal": "ceil(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(height/40)"},
      "domain": false,
      "labels": false,
      "aria": false,
      "maxExtent": 0,
      "minExtent": 0,
      "ticks": false,
      "zindex": 0
    },
    {
      "scale": "x",
      "orient": "bottom",
      "grid": false,
      "title": "x",
      "labelFlush": true,
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "grid": false,
      "title": "y, y2",
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(height/40)"},
      "zindex": 0
    }
  ],
  "legends": [{"stroke": "color", "symbolType": "stroke"}]
}