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{
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"$schema": "https://vega.github.io/schema/vega/v5.json",
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"description": "Area charts of stock prices, with an interactive overview and filtered detail views.",
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"width": 720,
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"height": 480,
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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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"url": "data_big.json",
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"transform": [
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{
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"type": "formula",
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"expr": "toDate(datum[\"time\"])",
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"as": "dateTime"
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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": "detailDomain"
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}
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],
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"marks": [
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{
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"type": "group",
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"name": "detail",
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"encode": {
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"enter": {
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"height": {"value": 390},
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"width": {"value": 720}
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}
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},
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"scales": [
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{
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"name": "xDetail",
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"type": "time",
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"range": "width",
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"domain": {"data": "table", "field": "dateTime"},
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"domainRaw": {"signal": "detailDomain"}
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},
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{
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"name": "yDetail",
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"type": "linear",
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"range": [390, 0],
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"domain": {"data": "table", "field": "value"},
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"nice": true, "zero": true
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}
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],
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"axes": [
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{"orient": "bottom", "scale": "xDetail"},
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{"orient": "left", "scale": "yDetail"}
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],
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"marks": [
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{
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"type": "group",
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"encode": {
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"enter": {
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"height": {"field": {"group": "height"}},
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"width": {"field": {"group": "width"}},
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"clip": {"value": true}
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}
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},
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"marks": [
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{
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"type": "symbol",
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"from": {"data": "table"},
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"encode": {
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"update": {
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"shape": {"value": "circle"},
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"size": {"value": 10},
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"x": {"scale": "xDetail", "field": "dateTime"},
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"y": {"scale": "yDetail", "field": "value"},
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"color": {"value": "both"},
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"strokeWidth": {"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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},
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{
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"type": "group",
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"name": "overview",
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"encode": {
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"enter": {
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"x": {"value": 0},
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"y": {"value": 430},
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"height": {"value": 70},
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"width": {"value": 720},
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"fill": {"value": "transparent"}
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}
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},
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"signals": [
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{
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"name": "brush", "value": 0,
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"on": [
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{
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"events": "@overview:mousedown",
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"update": "[x(), x()]"
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},
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{
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"events": "[@overview:mousedown, window:mouseup] > window:mousemove!",
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"update": "[brush[0], clamp(x(), 0, width)]"
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},
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{
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"events": {"signal": "delta"},
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"update": "clampRange([anchor[0] + delta, anchor[1] + delta], 0, width)"
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}
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]
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},
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{
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"name": "anchor", "value": null,
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"on": [{"events": "@brush:mousedown", "update": "slice(brush)"}]
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},
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{
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"name": "xdown", "value": 0,
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"on": [{"events": "@brush:mousedown", "update": "x()"}]
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},
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{
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"name": "delta", "value": 0,
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"on": [
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{
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"events": "[@brush:mousedown, window:mouseup] > window:mousemove!",
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"update": "x() - xdown"
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}
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]
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},
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{
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"name": "detailDomain",
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"push": "outer",
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"on": [
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{
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"events": {"signal": "brush"},
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"update": "span(brush) ? invert('xOverview', brush) : null"
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}
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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": "xOverview",
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"type": "time",
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"range": "width",
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"domain": {"data": "table", "field": "dateTime"}
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},
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{
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"name": "yOverview",
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"type": "linear",
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"range": [70, 0],
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"domain": {"data": "table", "field": "dateTime"},
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"nice": true, "zero": true
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}
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],
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"axes": [
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{"orient": "bottom", "scale": "xOverview"}
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],
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"marks": [
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{
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"type": "rect",
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"name": "brush",
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"encode": {
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"enter": {
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"y": {"value": 0},
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"height": {"value": 70},
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"fill": {"value": "#333"},
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"fillOpacity": {"value": 0.2}
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},
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"update": {
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"x": {"signal": "brush[0]"},
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"x2": {"signal": "brush[1]"}
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}
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}
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},
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{
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"type": "rect",
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"interactive": false,
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"encode": {
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"enter": {
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"y": {"value": 0},
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"height": {"value": 70},
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"width": {"value": 1},
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"fill": {"value": "firebrick"}
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},
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"update": {
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"x": {"signal": "brush[0]"}
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}
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}
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},
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{
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"type": "rect",
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"interactive": false,
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"encode": {
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"enter": {
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"y": {"value": 0},
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"height": {"value": 70},
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"width": {"value": 1},
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"fill": {"value": "firebrick"}
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},
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"update": {
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"x": {"signal": "brush[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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}
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