{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "background": "white",
  "padding": 5,
  "width": 200,
  "style": "cell",
  "data": [
    {
      "name": "source_0",
      "url": "data/barley.json",
      "format": {"type": "json"},
      "transform": [
        {
          "type": "aggregate",
          "groupby": ["variety"],
          "ops": ["stderr", "mean"],
          "fields": ["yield", "yield"],
          "as": ["extent_yield", "center_yield"]
        },
        {
          "type": "formula",
          "expr": "datum[\"center_yield\"] + datum[\"extent_yield\"]",
          "as": "upper_yield"
        },
        {
          "type": "formula",
          "expr": "datum[\"center_yield\"] - datum[\"extent_yield\"]",
          "as": "lower_yield"
        },
        {
          "type": "filter",
          "expr": "isValid(datum[\"lower_yield\"]) && isFinite(+datum[\"lower_yield\"])"
        }
      ]
    }
  ],
  "signals": [
    {"name": "y_step", "value": 20},
    {"name": "height", "update": "bandspace(domain('y').length, 0, 0) * y_step"}
  ],
  "marks": [
    {
      "name": "marks",
      "type": "rule",
      "style": ["rule", "errorbar-rule"],
      "from": {"data": "source_0"},
      "encode": {
        "update": {
          "ariaRoleDescription": {"value": "errorbar"},
          "stroke": {"value": "black"},
          "tooltip": {
            "signal": "isValid(datum[\"variety\"]) ? datum[\"variety\"] : \"\"+datum[\"variety\"]"
          },
          "description": {
            "signal": "\"yield: \" + (format(datum[\"lower_yield\"], \"\")) + \"; variety: \" + (isValid(datum[\"variety\"]) ? datum[\"variety\"] : \"\"+datum[\"variety\"]) + \"; upper_yield: \" + (format(datum[\"upper_yield\"], \"\"))"
          },
          "x": {"scale": "x", "field": "lower_yield"},
          "x2": {"scale": "x", "field": "upper_yield"},
          "y": {"scale": "y", "field": "variety", "band": 0.5}
        }
      }
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "linear",
      "domain": {"data": "source_0", "fields": ["lower_yield", "upper_yield"]},
      "range": [0, {"signal": "width"}],
      "zero": false,
      "nice": true
    },
    {
      "name": "y",
      "type": "band",
      "domain": {"data": "source_0", "field": "variety", "sort": true},
      "range": {"step": {"signal": "y_step"}},
      "paddingInner": 0,
      "paddingOuter": 0
    }
  ],
  "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": "yield",
      "labelFlush": true,
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "grid": false,
      "title": "variety",
      "zindex": 0
    }
  ]
}