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arc_pie.vg.json
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arc_pie.vg.json
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{
"$schema": "https://vega.github.io/schema/vega/v5.json",
"description": "A simple pie chart with embedded data.",
"background": "white",
"padding": 5,
"width": 200,
"height": 200,
"style": "view",
"data": [
{
"name": "source_0",
"values": [
{"category": 1, "value": 4},
{"category": 2, "value": 6},
{"category": 3, "value": 10},
{"category": 4, "value": 3},
{"category": 5, "value": 7},
{"category": 6, "value": 8}
]
},
{
"name": "data_0",
"source": "source_0",
"transform": [
{
"type": "stack",
"groupby": [],
"field": "value",
"sort": {"field": ["category"], "order": ["ascending"]},
"as": ["value_start", "value_end"],
"offset": "zero"
},
{
"type": "filter",
"expr": "isValid(datum[\"value\"]) && isFinite(+datum[\"value\"])"
}
]
}
],
"marks": [
{
"name": "marks",
"type": "arc",
"style": ["arc"],
"from": {"data": "data_0"},
"encode": {
"update": {
"fill": {"scale": "color", "field": "category"},
"description": {
"signal": "\"value: \" + (format(datum[\"value\"], \"\")) + \"; category: \" + (isValid(datum[\"category\"]) ? datum[\"category\"] : \"\"+datum[\"category\"])"
},
"x": {"signal": "width", "mult": 0.5},
"y": {"signal": "height", "mult": 0.5},
"outerRadius": {"signal": "min(width,height)/2"},
"innerRadius": {"value": 0},
"startAngle": {"scale": "theta", "field": "value_end"},
"endAngle": {"scale": "theta", "field": "value_start"}
}
}
}
],
"scales": [
{
"name": "theta",
"type": "linear",
"domain": {"data": "data_0", "fields": ["value_start", "value_end"]},
"range": [0, 6.283185307179586],
"zero": true
},
{
"name": "color",
"type": "ordinal",
"domain": {"data": "data_0", "field": "category", "sort": true},
"range": "category"
}
],
"legends": [{"fill": "color", "symbolType": "circle", "title": "category"}]
}