{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "description": "A population pyramid for the US in 2000, created using stack. See https://vega.github.io/vega-lite/examples/concat_population_pyramid.html for a variant of this created using concat.",
  "background": "white",
  "padding": 5,
  "width": 300,
  "height": 200,
  "style": "cell",
  "data": [
    {
      "name": "source_0",
      "url": "data/population.json",
      "format": {"type": "json"},
      "transform": [
        {"type": "filter", "expr": "datum.year == 2000"},
        {
          "type": "formula",
          "expr": "datum.sex == 2 ? 'Female' : 'Male'",
          "as": "gender"
        },
        {
          "type": "formula",
          "expr": "datum.sex == 2 ? -datum.people : datum.people",
          "as": "signed_people"
        }
      ]
    },
    {
      "name": "data_0",
      "source": "source_0",
      "transform": [
        {
          "type": "aggregate",
          "groupby": ["age", "gender"],
          "ops": ["sum"],
          "fields": ["signed_people"],
          "as": ["sum_signed_people"]
        },
        {
          "type": "stack",
          "groupby": ["age"],
          "field": "sum_signed_people",
          "sort": {"field": ["gender"], "order": ["ascending"]},
          "as": ["sum_signed_people_start", "sum_signed_people_end"],
          "offset": "zero"
        },
        {
          "type": "filter",
          "expr": "isValid(datum[\"sum_signed_people\"]) && isFinite(+datum[\"sum_signed_people\"])"
        }
      ]
    }
  ],
  "marks": [
    {
      "name": "marks",
      "type": "rect",
      "style": ["bar"],
      "from": {"data": "data_0"},
      "encode": {
        "update": {
          "fill": {"scale": "color", "field": "gender"},
          "ariaRoleDescription": {"value": "bar"},
          "description": {
            "signal": "\"population: \" + (format(datum[\"sum_signed_people\"], \"s\")) + \"; age: \" + (isValid(datum[\"age\"]) ? datum[\"age\"] : \"\"+datum[\"age\"]) + \"; gender: \" + (isValid(datum[\"gender\"]) ? datum[\"gender\"] : \"\"+datum[\"gender\"])"
          },
          "x": {"scale": "x", "field": "sum_signed_people_end"},
          "x2": {"scale": "x", "field": "sum_signed_people_start"},
          "y": {"scale": "y", "field": "age"},
          "height": {"scale": "y", "band": 1}
        }
      }
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "linear",
      "domain": {
        "data": "data_0",
        "fields": ["sum_signed_people_start", "sum_signed_people_end"]
      },
      "range": [0, {"signal": "width"}],
      "nice": true,
      "zero": true
    },
    {
      "name": "y",
      "type": "band",
      "domain": {
        "data": "source_0",
        "field": "age",
        "sort": {"order": "descending"}
      },
      "range": [0, {"signal": "height"}],
      "paddingInner": 0.1,
      "paddingOuter": 0.05
    },
    {
      "name": "color",
      "type": "ordinal",
      "domain": {"data": "data_0", "field": "gender", "sort": true},
      "range": ["#675193", "#ca8861"]
    }
  ],
  "axes": [
    {
      "scale": "x",
      "orient": "bottom",
      "grid": false,
      "title": "population",
      "format": "s",
      "labelFlush": true,
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "zindex": 0
    }
  ],
  "legends": [
    {
      "orient": "top",
      "fill": "color",
      "direction": "horizontal",
      "symbolType": "square"
    }
  ],
  "config": {"axis": {"grid": false}, "style": {"cell": {"stroke": null}}}
}