{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "background": "white",
  "padding": 5,
  "width": 200,
  "style": "cell",
  "data": [
    {
      "name": "source_0",
      "values": {
        "features": [
          {
            "properties": {
              "variety": "Manchuria",
              "yield": 27,
              "site": "University Farm"
            }
          },
          {
            "properties": {
              "variety": "Wisconsin No. 38",
              "yield": 29.33333,
              "site": "Duluth"
            }
          }
        ],
        "type": "FeatureCollection"
      },
      "format": {"type": "json", "property": "features"}
    },
    {
      "name": "data_0",
      "source": "source_0",
      "transform": [
        {
          "type": "formula",
          "expr": "datum[\"properties\"] && datum[\"properties\"][\"yield\"]",
          "as": "properties.yield"
        },
        {
          "type": "formula",
          "expr": "datum[\"properties\"] && datum[\"properties\"][\"variety\"]",
          "as": "properties.variety"
        },
        {
          "type": "formula",
          "expr": "datum[\"properties\"] && datum[\"properties\"][\"site\"]",
          "as": "properties.site"
        },
        {
          "type": "aggregate",
          "groupby": ["properties\\.variety", "properties\\.site"],
          "ops": ["sum"],
          "fields": ["properties\\.yield"],
          "as": ["sum_properties.yield"]
        },
        {
          "type": "stack",
          "groupby": ["properties\\.variety"],
          "field": "sum_properties\\.yield",
          "sort": {"field": ["properties\\.site"], "order": ["ascending"]},
          "as": ["sum_properties.yield_start", "sum_properties.yield_end"],
          "offset": "zero"
        },
        {
          "type": "filter",
          "expr": "isValid(datum[\"sum_properties.yield\"]) && isFinite(+datum[\"sum_properties.yield\"])"
        }
      ]
    }
  ],
  "signals": [
    {"name": "y_step", "value": 20},
    {
      "name": "height",
      "update": "bandspace(domain('y').length, 0.1, 0.05) * y_step"
    }
  ],
  "marks": [
    {
      "name": "marks",
      "type": "rect",
      "style": ["bar"],
      "from": {"data": "data_0"},
      "encode": {
        "update": {
          "fill": {"scale": "color", "field": "properties\\.site"},
          "ariaRoleDescription": {"value": "bar"},
          "description": {
            "signal": "\"Sum of properties.yield: \" + (format(datum[\"sum_properties.yield\"], \"\")) + \"; properties.variety: \" + (isValid(datum[\"properties.variety\"]) ? datum[\"properties.variety\"] : \"\"+datum[\"properties.variety\"]) + \"; site: \" + (isValid(datum[\"properties.site\"]) ? datum[\"properties.site\"] : \"\"+datum[\"properties.site\"])"
          },
          "x": {"scale": "x", "field": "sum_properties\\.yield_end"},
          "x2": {"scale": "x", "field": "sum_properties\\.yield_start"},
          "y": {"scale": "y", "field": "properties\\.variety"},
          "height": {"scale": "y", "band": 1}
        }
      }
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "linear",
      "domain": {
        "data": "data_0",
        "fields": ["sum_properties\\.yield_start", "sum_properties\\.yield_end"]
      },
      "range": [0, {"signal": "width"}],
      "nice": true,
      "zero": true
    },
    {
      "name": "y",
      "type": "band",
      "domain": {
        "data": "data_0",
        "field": "properties\\.variety",
        "sort": true
      },
      "range": {"step": {"signal": "y_step"}},
      "paddingInner": 0.1,
      "paddingOuter": 0.05
    },
    {
      "name": "color",
      "type": "ordinal",
      "domain": {"data": "data_0", "field": "properties\\.site", "sort": true},
      "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": "x",
      "orient": "bottom",
      "grid": false,
      "title": "Sum of properties.yield",
      "labelFlush": true,
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "grid": false,
      "title": "properties.variety",
      "zindex": 0
    }
  ],
  "legends": [{"title": "site", "fill": "color", "symbolType": "square"}]
}