Extension:Graph/Demo/Dimpvis

From Linux Web Expert

From https://vega.github.io/editor/#/examples/vega/global-development <graph mode=interactive title="Life Expectancy vs Family Size (click and drag)"> {

 "$schema": "https://vega.github.io/schema/vega/v5.json",
 "description": "An interactive scatter plot of global health statistics by country and year.",
 "width": 800,
 "height": 600,
 "padding": 5,
 "data": [
   {
     "name": "gapminder",
     "url": "https://www.mediawiki.org/wiki/Extension:Graph/data/gapminder-json?action=raw"
   },
   {
     "name": "clusters",
     "values": [
       {"id": 0, "name": "South Asia"},
       {"id": 1, "name": "Europe & Central Asia"},
       {"id": 2, "name": "Sub-Saharan Africa"},
       {"id": 3, "name": "America"},
       {"id": 4, "name": "East Asia & Pacific"},
       {"id": 5, "name": "Middle East & North Africa"}
     ]
   },
   {
     "name": "country_timeline",
     "source": "gapminder",
     "transform": [
       {"type": "filter", "expr": "timeline && datum.country == timeline.country"},
       {"type": "collect", "sort": {"field": "year"}}
     ]
   },
   {
     "name": "thisYear",
     "source": "gapminder",
     "transform": [
       {"type": "filter", "expr": "datum.year == currentYear"}
     ]
   },
   {
     "name": "prevYear",
     "source": "gapminder",
     "transform": [
       {"type": "filter", "expr": "datum.year == currentYear - stepYear"}
     ]
   },
   {
     "name": "nextYear",
     "source": "gapminder",
     "transform": [
       {"type": "filter", "expr": "datum.year == currentYear + stepYear"}
     ]
   },
   {
     "name": "countries",
     "source": "gapminder",
     "transform": [
       {"type": "aggregate", "groupby": ["country"]}
     ]
   },
   {
     "name": "interpolate",
     "source": "countries",
     "transform": [
       {
         "type": "lookup",
         "from": "thisYear", "key": "country",
         "fields": ["country"], "as": ["this"],
         "default": {}
       },
       {
         "type": "lookup",
         "from": "prevYear", "key": "country",
         "fields": ["country"], "as": ["prev"],
         "default": {}
       },
       {
         "type": "lookup",
         "from": "nextYear", "key": "country",
         "fields": ["country"], "as": ["next"],
         "default": {}
       },
       {
         "type": "formula",
         "as": "target_fertility",
         "expr": "interYear > currentYear ? datum.next.fertility : (datum.prev.fertility||datum.this.fertility)"
       },
       {
         "type": "formula",
         "as": "target_life_expect",
         "expr": "interYear > currentYear ? datum.next.life_expect : (datum.prev.life_expect||datum.this.life_expect)"
       },
       {
         "type": "formula",
         "as": "inter_fertility",
         "expr": "interYear==2000 ? datum.this.fertility : datum.this.fertility + (datum.target_fertility-datum.this.fertility) * abs(interYear-datum.this.year)/5"
       },
       {
         "type": "formula",
         "as": "inter_life_expect",
         "expr": "interYear==2000 ? datum.this.life_expect : datum.this.life_expect + (datum.target_life_expect-datum.this.life_expect) * abs(interYear-datum.this.year)/5"
       }
     ]
   },
   {
     "name": "trackCountries",
     "on": [
       {"trigger": "active", "toggle": "{country: active.country}"}
     ]
   }
 ],
 "signals": [
   { "name": "minYear", "value": 1955 },
   { "name": "maxYear", "value": 2005 },
   { "name": "stepYear", "value": 5 },
   {
     "name": "active",
     "value": {},
     "on": [
       {"events": "@point:mousedown, @point:touchstart", "update": "datum"},
       {"events": "window:mouseup, window:touchend", "update": "{}"}
     ]
   },
   { "name": "isActive", "update": "active.country" },
   {
     "name": "timeline",
     "value": {},
     "on": [
       {"events": "@point:mouseover", "update": "isActive ? active : datum"},
       {"events": "@point:mouseout", "update": "active"},
       {"events": {"signal": "active"}, "update": "active"}
     ]
   },
   {
     "name": "tX",
     "on": [{
       "events": "mousemove!, touchmove!",
       "update": "isActive ? scale('x', active.this.fertility) : tX"
     }]
   },
   {
     "name": "tY",
     "on": [{
       "events": "mousemove, touchmove",
       "update": "isActive ? scale('y', active.this.life_expect) : tY"
     }]
   },
   {
     "name": "pX",
     "on": [{
       "events": "mousemove, touchmove",
       "update": "isActive ? scale('x', active.prev.fertility) : pX"
     }]
   },
   {
     "name": "pY",
     "on": [{
       "events": "mousemove, touchmove",
       "update": "isActive ? scale('y', active.prev.life_expect) : pY"
     }]
   },
   {
     "name": "nX",
     "on": [{
       "events": "mousemove, touchmove",
       "update": "isActive ? scale('x', active.next.fertility) : nX"
     }]
   },
   {
     "name": "nY",
     "on": [{
       "events": "mousemove, touchmove",
       "update": "isActive ? scale('y', active.next.life_expect) : nY"
     }]
   },
   {
     "name": "thisDist",
     "value": 0,
     "on":[{
       "events": "mousemove, touchmove",
       "update": "isActive ? sqrt(pow(x()-tX, 2) + pow(y()-tY, 2)) : thisDist"
     }]
   },
   {
     "name": "prevDist",
     "value": 0,
     "on":[{
       "events": "mousemove, touchmove",
       "update": "isActive ? sqrt(pow(x()-pX, 2) + pow(y()-pY, 2)): prevDist"
     }]
   },
   {
     "name": "nextDist",
     "value": 0,
     "on":[{
       "events": "mousemove, touchmove",
       "update": "isActive ? sqrt(pow(x()-nX, 2) + pow(y()-nY, 2)) : nextDist"
     }]
   },
   {
     "name": "prevScore",
     "value": 0,
     "on": [{
       "events": "mousemove, touchmove",
       "update": "isActive ? ((pX-tX) * (x()-tX) + (pY-tY) * (y()-tY))/prevDist || -999999 : prevScore"
     }]
   },
   {
     "name": "nextScore",
     "value": 0,
     "on": [{
       "events": "mousemove, touchmove",
       "update": "isActive ? ((nX-tX) * (x()-tX) + (nY-tY) * (y()-tY))/nextDist || -999999 : nextScore"
     }]
   },
   {
     "name": "interYear",
     "value": 1980,
     "on": [{
       "events": "mousemove, touchmove",
       "update": "isActive ? (min(maxYear, currentYear+5, max(minYear, currentYear-5, prevScore > nextScore ? (currentYear - 2.5*prevScore/sqrt(pow(pX-tX, 2) + pow(pY-tY, 2))) : (currentYear + 2.5*nextScore/sqrt(pow(nX-tX, 2) + pow(nY-tY, 2)))))) : interYear"
     }]
   },
   {
     "name": "currentYear",
     "value": 1980,
     "on":[{
       "events": "mousemove, touchmove",
       "update": "isActive ? (min(maxYear, max(minYear, prevScore > nextScore ? (thisDist < prevDist ? currentYear : currentYear-5) : (thisDist < nextDist ? currentYear : currentYear+5)))) : currentYear"
     }]
   }
 ],
 "scales": [
   {
     "name": "x",
     "type": "linear", "nice": true,
     "domain": {"data": "gapminder", "field": "fertility"},
     "range": "width"
   },
   {
     "name": "y",
     "type": "linear", "nice": true, "zero": false,
     "domain": {"data": "gapminder", "field": "life_expect"},
     "range": "height"
   },
   {
     "name": "color",
     "type": "ordinal",
     "domain": {"data": "gapminder", "field": "cluster"},
     "range": "category"
   },
   {
     "name": "label",
     "type": "ordinal",
     "domain": {"data": "clusters", "field": "id"},
     "range": {"data": "clusters", "field": "name"}
   }
 ],
 "axes": [
   {
     "title": "Fertility",
     "orient": "bottom", "scale": "x",
     "grid": true, "tickCount": 5
   },
   {
     "title": "Life Expectancy",
     "orient": "left", "scale": "y",
     "grid": true, "tickCount": 5
   }
 ],
 "legends": [
   {
     "fill": "color",
     "title": "Region",
     "orient": "right",
     "encode": {
       "symbols": {
         "enter": {
           "fillOpacity": {"value": 0.5}
         }
       },
       "labels": {
         "update": {
           "text": {"scale": "label", "field": "value"}
         }
       }
     }
   }
 ],
 "marks": [
   {
     "type": "text",
     "encode": {
       "update": {
         "text": {"signal": "currentYear"},
         "x": {"value": 300},
         "y": {"value": 300},
         "fill": {"value": "grey"},
         "fillOpacity": {"value": 0.25},
         "fontSize": {"value": 100}
       }
     }
   },
   {
     "type": "text",
     "from": {"data": "country_timeline"},
     "interactive": false,
     "encode": {
       "enter": {
         "x": {"scale": "x", "field": "fertility", "offset": 5},
         "y": {"scale": "y", "field": "life_expect"},
         "fill": {"value": "#555"},
         "fillOpacity": {"value": 0.6},
         "text": {"field": "year"}
       }
     }
   },
   {
     "type": "line",
     "from": {"data": "country_timeline"},
     "encode": {
       "update": {
         "x": {"scale": "x", "field": "fertility"},
         "y": {"scale": "y", "field": "life_expect"},
         "stroke": {"value": "#bbb"},
         "strokeWidth": {"value": 5},
         "strokeOpacity": {"value": 0.5}
       }
     }
   },
   {
     "name": "point",
     "type": "symbol",
     "from": {"data": "interpolate"},
     "encode": {
       "enter": {
         "fill": {"scale": "color", "field": "this.cluster"},
         "size": {"value": 150}
       },
       "update": {
         "x": {"scale": "x", "field": "inter_fertility"},
         "y": {"scale": "y", "field": "inter_life_expect"},
         "fillOpacity": [
           {
             "test": "datum.country==timeline.country || indata('trackCountries', 'country', datum.country)",
             "value": 1
           },
           {"value": 0.5}
         ]
       }
     }
   },
   {
     "type": "text",
     "from": {"data": "interpolate"},
     "interactive": false,
     "encode": {
       "enter": {
         "fill": {"value": "#333"},
         "fontSize": {"value": 14},
         "fontWeight": {"value": "bold"},
         "text": {"field": "country"},
         "align": {"value": "center"},
         "baseline": {"value": "bottom"}
       },
       "update": {
         "x": {"scale": "x", "field": "inter_fertility"},
         "y": {"scale": "y", "field": "inter_life_expect", "offset": -7},
         "fillOpacity": [
           {
             "test": "datum.country==timeline.country || indata('trackCountries', 'country', datum.country)",
             "value": 0.8
           },
           {"value": 0}
         ]
       }
     }
   }
 ]

} </graph>