{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "background": "white",
  "padding": 5,
  "data": [
    {
      "name": "source_0",
      "url": "https://cdn.jsdelivr.net/npm/vega-datasets@v1.29.0/data/barley.json",
      "format": {"type": "json"}
    },
    {
      "name": "column_domain",
      "source": "source_0",
      "transform": [{"type": "aggregate", "groupby": ["site"]}]
    },
    {
      "name": "data_1",
      "source": "source_0",
      "transform": [
        {
          "type": "aggregate",
          "groupby": ["year", "site"],
          "ops": ["ci0", "ci1", "mean", "mean"],
          "fields": ["yield", "yield", "yield", "yield"],
          "as": ["lower_yield", "upper_yield", "center_yield", "mean_yield"]
        }
      ]
    },
    {
      "name": "data_2",
      "source": "data_1",
      "transform": [
        {
          "type": "filter",
          "expr": "isValid(datum[\"lower_yield\"]) && isFinite(+datum[\"lower_yield\"])"
        }
      ]
    },
    {
      "name": "data_3",
      "source": "data_1",
      "transform": [
        {
          "type": "filter",
          "expr": "isValid(datum[\"mean_yield\"]) && isFinite(+datum[\"mean_yield\"])"
        }
      ]
    }
  ],
  "signals": [
    {"name": "x_step", "value": 20},
    {
      "name": "child_width",
      "update": "bandspace(domain('x').length, 0.1, 0.05) * x_step"
    },
    {"name": "child_height", "value": 300}
  ],
  "layout": {
    "padding": 20,
    "offset": {"columnTitle": 10},
    "columns": {"signal": "length(data('column_domain'))"},
    "bounds": "full",
    "align": "all"
  },
  "marks": [
    {
      "name": "column-title",
      "type": "group",
      "role": "column-title",
      "title": {"text": "site", "style": "guide-title", "offset": 10}
    },
    {
      "name": "row_header",
      "type": "group",
      "role": "row-header",
      "encode": {"update": {"height": {"signal": "child_height"}}},
      "axes": [
        {
          "scale": "y",
          "orient": "left",
          "grid": false,
          "title": "Mean Yield, yield",
          "labelOverlap": true,
          "tickCount": {"signal": "ceil(child_height/40)"},
          "zindex": 0
        }
      ]
    },
    {
      "name": "column_header",
      "type": "group",
      "role": "column-header",
      "from": {"data": "column_domain"},
      "sort": {"field": "datum[\"site\"]", "order": "ascending"},
      "title": {
        "text": {
          "signal": "isValid(parent[\"site\"]) ? parent[\"site\"] : \"\"+parent[\"site\"]"
        },
        "style": "guide-label",
        "frame": "group",
        "offset": 10
      },
      "encode": {"update": {"width": {"signal": "child_width"}}}
    },
    {
      "name": "column_footer",
      "type": "group",
      "role": "column-footer",
      "from": {"data": "column_domain"},
      "sort": {"field": "datum[\"site\"]", "order": "ascending"},
      "encode": {"update": {"width": {"signal": "child_width"}}},
      "axes": [
        {
          "scale": "x",
          "orient": "bottom",
          "grid": false,
          "title": "year",
          "labelAlign": "right",
          "labelAngle": 270,
          "labelBaseline": "middle",
          "zindex": 0
        }
      ]
    },
    {
      "name": "cell",
      "type": "group",
      "style": "cell",
      "from": {
        "facet": {"name": "facet", "data": "source_0", "groupby": ["site"]}
      },
      "sort": {"field": ["datum[\"site\"]"], "order": ["ascending"]},
      "data": [
        {
          "source": "facet",
          "name": "data_0",
          "transform": [
            {
              "type": "aggregate",
              "groupby": ["year"],
              "ops": ["ci0", "ci1", "mean", "mean"],
              "fields": ["yield", "yield", "yield", "yield"],
              "as": ["lower_yield", "upper_yield", "center_yield", "mean_yield"]
            }
          ]
        },
        {
          "name": "data_1",
          "source": "data_0",
          "transform": [
            {
              "type": "filter",
              "expr": "isValid(datum[\"lower_yield\"]) && isFinite(+datum[\"lower_yield\"])"
            }
          ]
        },
        {
          "name": "data_2",
          "source": "data_0",
          "transform": [
            {
              "type": "filter",
              "expr": "isValid(datum[\"mean_yield\"]) && isFinite(+datum[\"mean_yield\"])"
            }
          ]
        }
      ],
      "encode": {
        "update": {
          "width": {"signal": "child_width"},
          "height": {"signal": "child_height"}
        }
      },
      "marks": [
        {
          "name": "child_layer_0_marks",
          "type": "rect",
          "style": ["bar"],
          "from": {"data": "data_2"},
          "encode": {
            "update": {
              "fill": {"scale": "color", "field": "year"},
              "ariaRoleDescription": {"value": "bar"},
              "description": {
                "signal": "\"year: \" + (isValid(datum[\"year\"]) ? datum[\"year\"] : \"\"+datum[\"year\"]) + \"; Mean Yield: \" + (format(datum[\"mean_yield\"], \"\"))"
              },
              "x": {"scale": "x", "field": "year"},
              "width": {"scale": "x", "band": 1},
              "y": {"scale": "y", "field": "mean_yield"},
              "y2": {"scale": "y", "value": 0}
            }
          }
        },
        {
          "name": "child_layer_1_marks",
          "type": "rule",
          "style": ["rule", "errorbar-rule"],
          "from": {"data": "data_1"},
          "encode": {
            "update": {
              "ariaRoleDescription": {"value": "errorbar"},
              "stroke": {"value": "black"},
              "tooltip": {
                "signal": "{\"Ci1 of yield\": format(datum[\"upper_yield\"], \"\"), \"Ci0 of yield\": format(datum[\"lower_yield\"], \"\"), \"Mean of yield\": format(datum[\"center_yield\"], \"\"), \"year\": isValid(datum[\"year\"]) ? datum[\"year\"] : \"\"+datum[\"year\"]}"
              },
              "description": {
                "signal": "\"year: \" + (isValid(datum[\"year\"]) ? datum[\"year\"] : \"\"+datum[\"year\"]) + \"; yield: \" + (format(datum[\"lower_yield\"], \"\")) + \"; upper_yield: \" + (format(datum[\"upper_yield\"], \"\")) + \"; Ci1 of yield: \" + (format(datum[\"upper_yield\"], \"\")) + \"; Ci0 of yield: \" + (format(datum[\"lower_yield\"], \"\")) + \"; Mean of yield: \" + (format(datum[\"center_yield\"], \"\"))"
              },
              "x": {"scale": "x", "field": "year", "band": 0.5},
              "y": {"scale": "y", "field": "lower_yield"},
              "y2": {"scale": "y", "field": "upper_yield"}
            }
          }
        }
      ],
      "axes": [
        {
          "scale": "y",
          "orient": "left",
          "gridScale": "x",
          "grid": true,
          "tickCount": {"signal": "ceil(child_height/40)"},
          "domain": false,
          "labels": false,
          "aria": false,
          "maxExtent": 0,
          "minExtent": 0,
          "ticks": false,
          "zindex": 0
        }
      ]
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "band",
      "domain": {
        "fields": [
          {"data": "data_3", "field": "year"},
          {"data": "data_2", "field": "year"}
        ],
        "sort": true
      },
      "range": {"step": {"signal": "x_step"}},
      "paddingInner": 0.1,
      "paddingOuter": 0.05
    },
    {
      "name": "y",
      "type": "linear",
      "domain": {
        "fields": [
          {"data": "data_3", "field": "mean_yield"},
          {"data": "data_2", "field": "lower_yield"},
          {"data": "data_2", "field": "upper_yield"}
        ]
      },
      "range": [{"signal": "child_height"}, 0],
      "nice": true,
      "zero": true
    },
    {
      "name": "color",
      "type": "ordinal",
      "domain": {"data": "data_3", "field": "year", "sort": true},
      "range": "category"
    }
  ],
  "legends": [{"fill": "color", "symbolType": "square", "title": "year"}]
}