Created
November 30, 2015 21:46
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| { | |
| "width": 200, | |
| "height": 200, | |
| "padding": "auto", | |
| "data": [ | |
| { | |
| "name": "source", | |
| "url": "data/cars.json", | |
| "format": {"type": "json","parse": {"Acceleration": "number"}}, | |
| "transform": [ | |
| { | |
| "type": "filter", | |
| "test": "datum.Acceleration!==null" | |
| } | |
| ] | |
| }, | |
| { | |
| "name": "summary", | |
| "source": "source", | |
| "transform": [ | |
| { | |
| "type": "aggregate", | |
| "groupby": ["Cylinders"], | |
| "summarize": {"Acceleration": ["mean"]} | |
| } | |
| ] | |
| }, | |
| { | |
| "name": "layout", | |
| "source": "summary", | |
| "transform": [ | |
| { | |
| "type": "aggregate", | |
| "summarize": [{"field": "Cylinders","ops": ["distinct"]}] | |
| }, | |
| { | |
| "type": "formula", | |
| "field": "cellWidth", | |
| "expr": "(datum.distinct_Cylinders + 1) * 21" | |
| } | |
| ] | |
| } | |
| ], | |
| "marks": [ | |
| { | |
| "name": "root", | |
| "type": "group", | |
| "from": {"data": "layout"}, | |
| "properties": { | |
| "update": { | |
| "width": {"field": "cellWidth"}, | |
| "height": {"value": 200} | |
| } | |
| }, | |
| "marks": [ | |
| { | |
| "type": "rect", | |
| "properties": { | |
| "update": { | |
| "xc": {"scale": "x","field": "Cylinders"}, | |
| "width": {"value": 21,"offset": -1}, | |
| "y": {"scale": "y","field": "mean_Acceleration"}, | |
| "y2": {"field": {"group": "height"}}, | |
| "fill": {"value": "#4682b4"} | |
| } | |
| }, | |
| "from": {"data": "summary"} | |
| } | |
| ], | |
| "scales": [ | |
| { | |
| "name": "x", | |
| "type": "ordinal", | |
| "domain": { | |
| "data": "summary", | |
| "field": "Cylinders", | |
| "sort": true | |
| }, | |
| "rangeMin": 0, | |
| "rangeMax": {"data": "layout","field": "cellWidth"}, | |
| "round": true, | |
| "clamp": true, | |
| "bandWidth": 21, | |
| "padding": 1, | |
| "points": true | |
| }, | |
| { | |
| "name": "y", | |
| "type": "linear", | |
| "domain": { | |
| "data": "summary", | |
| "field": "mean_Acceleration", | |
| "sort": true | |
| }, | |
| "rangeMin": 200, | |
| "rangeMax": 0, | |
| "round": true, | |
| "clamp": true, | |
| "nice": true | |
| } | |
| ], | |
| "axes": [ | |
| { | |
| "type": "x", | |
| "scale": "x", | |
| "grid": false, | |
| "ticks": 5, | |
| "title": "Cylinders", | |
| "properties": { | |
| "labels": { | |
| "angle": {"value": 270}, | |
| "align": {"value": "right"}, | |
| "baseline": {"value": "middle"}, | |
| "text": {"template": "{{ datum.data | truncate:25}}"} | |
| } | |
| } | |
| }, | |
| { | |
| "type": "y", | |
| "scale": "y", | |
| "format": "s", | |
| "grid": true, | |
| "layer": "back", | |
| "title": "MEAN(Acceleration)" | |
| } | |
| ] | |
| } | |
| ] | |
| } |
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