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{
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"$schema": "https://vega.github.io/schema/vega/v5.json",
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"description": "A basic bar chart example, with value labels shown upon mouse hover.",
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"width": 400,
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"height": 200,
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"padding": 5,
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"data": [
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{
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"name": "table",
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"values": [
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{"category": "A", "amount": 28},
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{"category": "B", "amount": 55},
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{"category": "C", "amount": 43},
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{"category": "D", "amount": 91},
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{"category": "E", "amount": 81},
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{"category": "F", "amount": 53},
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{"category": "G", "amount": 19},
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{"category": "H", "amount": 87}
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]
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}
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],
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"signals": [
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{
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"name": "tooltip",
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"value": {},
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"on": [
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{"events": "rect:mouseover", "update": "datum"},
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{"events": "rect:mouseout", "update": "{}"}
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]
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}
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],
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"scales": [
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{
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"name": "xscale",
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"type": "band",
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"domain": {"data": "table", "field": "category"},
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"range": "width",
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"padding": 0.05,
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"round": true
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},
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{
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"name": "yscale",
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"domain": {"data": "table", "field": "amount"},
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"nice": true,
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"range": "height"
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}
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],
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"axes": [
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{ "orient": "bottom", "scale": "xscale" },
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{ "orient": "left", "scale": "yscale" }
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],
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"marks": [
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{
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"type": "rect",
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"from": {"data":"table"},
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"encode": {
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"enter": {
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"x": {"scale": "xscale", "field": "category"},
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"width": {"scale": "xscale", "band": 1},
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"y": {"scale": "yscale", "field": "amount"},
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"y2": {"scale": "yscale", "value": 0}
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},
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"update": {
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"fill": {"value": "steelblue"}
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},
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"hover": {
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"fill": {"value": "red"}
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}
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}
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},
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{
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"type": "text",
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"encode": {
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"enter": {
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"align": {"value": "center"},
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"baseline": {"value": "bottom"},
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"fill": {"value": "#333"}
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},
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"update": {
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"x": {"scale": "xscale", "signal": "tooltip.category", "band": 0.5},
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"y": {"scale": "yscale", "signal": "tooltip.amount", "offset": -2},
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87
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"text": {"signal": "tooltip.amount"},
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"fillOpacity": [
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{"test": "datum === tooltip", "value": 0},
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{"value": 1}
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]
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}
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}
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}
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]
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}
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