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bar_diverging_stack_population_pyramid.vg.json
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bar_diverging_stack_population_pyramid.vg.json
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{
"$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": {"signal": "max(0.25, bandwidth('y'))"}
}
}
}
],
"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}}}
}