{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "background": "white",
  "padding": 5,
  "height": 200,
  "style": "cell",
  "data": [
    {
      "name": "source_0",
      "values": [
        {"rank": "1"},
        {"rank": "2", "options": {"price": 16}},
        {"rank": "3", "options": {"price": 17}}
      ]
    },
    {
      "name": "data_0",
      "source": "source_0",
      "transform": [
        {
          "type": "formula",
          "expr": "datum[\"options\"] && datum[\"options\"][\"price\"]",
          "as": "options.price"
        },
        {"type": "filter", "expr": "datum.options != null && datum.options.price != null"}
      ]
    }
  ],
  "signals": [
    {"name": "x_step", "value": 20},
    {
      "name": "width",
      "update": "bandspace(domain('x').length, 1, 0.5) * x_step"
    }
  ],
  "marks": [
    {
      "name": "marks",
      "type": "line",
      "style": ["line"],
      "sort": {"field": "datum[\"rank\"]"},
      "from": {"data": "data_0"},
      "encode": {
        "update": {
          "stroke": {"value": "#4c78a8"},
          "description": {
            "signal": "\"rank: \" + (isValid(datum[\"rank\"]) ? datum[\"rank\"] : \"\"+datum[\"rank\"]) + \"; options.price: \" + (format(datum[\"options.price\"], \"\"))"
          },
          "x": {"scale": "x", "field": "rank"},
          "y": {"scale": "y", "field": "options\\.price"},
          "defined": {
            "signal": "isValid(datum[\"options.price\"]) && isFinite(+datum[\"options.price\"])"
          }
        }
      }
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "point",
      "domain": {"data": "data_0", "field": "rank", "sort": true},
      "range": {"step": {"signal": "x_step"}},
      "padding": 0.5
    },
    {
      "name": "y",
      "type": "linear",
      "domain": {"data": "data_0", "field": "options\\.price"},
      "range": [{"signal": "height"}, 0],
      "nice": true,
      "zero": true
    }
  ],
  "axes": [
    {
      "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": "rank",
      "labelAlign": "right",
      "labelAngle": 270,
      "labelBaseline": "middle",
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "grid": false,
      "title": "options.price",
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(height/40)"},
      "zindex": 0
    }
  ]
}