Created
March 1, 2019 15:54
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Multiple histograms in `vega`, colour-coded by a feature
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| { | |
| "$schema": "https://vega.github.io/schema/vega/v5.json", | |
| "width": 200, | |
| "height": 200, | |
| "padding": 5, | |
| "data": [ | |
| { | |
| "name": "d1", | |
| "values": [ | |
| {"a": 0, "c": "2.5", "z": 0}, | |
| {"a": 1, "c": "6.5", "z": 0}, | |
| {"a": 2, "c": "15.2", "z": 0}, | |
| {"a": 3, "c": "12", "z": 0}, | |
| {"a": 4, "c": "6", "z": 0}, | |
| {"a": 2, "c": "8.5", "z": 1}, | |
| {"a": 3, "c": "17.2", "z": 1}, | |
| {"a": 4, "c": "13", "z": 1}, | |
| {"a": 5, "c": "4", "z": 1} | |
| ] | |
| } | |
| ], | |
| "scales": [ | |
| { | |
| "name": "dom", | |
| "type": "band", | |
| "domain": {"data": "d1", "field": "a"}, | |
| "range": "width", | |
| "padding": 0.0 | |
| }, | |
| { | |
| "name": "scy", | |
| "type": "linear", | |
| "domain": {"data": "d1", "field": "c"}, | |
| "range": "height", | |
| "zero": true | |
| }, | |
| { | |
| "name": "colours", | |
| "type": "ordinal", | |
| "domain": {"data": "d1", "field": "z"}, | |
| "range": ["#ff0000", "#0000ff"] | |
| } | |
| ], | |
| "axes": [ | |
| { | |
| "orient": "bottom", | |
| "scale": "dom", | |
| "title": "a", | |
| "offset": 0, | |
| "tickMinStep": 5 | |
| }, | |
| { | |
| "orient": "left", | |
| "scale": "scy", | |
| "title": "c", | |
| "offset": 10, | |
| "tickMinStep": 5 | |
| } | |
| ], | |
| "marks": [ | |
| { | |
| "type": "group", | |
| "marks": [ | |
| { | |
| "type": "rect", | |
| "from": {"data": "d1"}, | |
| "encode": { | |
| "enter": { | |
| "fill": {"scale" : "colours", "field" : "z"}, | |
| "x": {"scale": "dom", "field": "a"}, | |
| "width": {"scale": "dom", "band": 1}, | |
| "y": {"scale": "scy", "value": 0}, | |
| "y2": {"scale": "scy", "field": "c"}, | |
| "fillOpacity": {"value": 0.3} | |
| } | |
| } | |
| } | |
| ] | |
| } | |
| ] | |
| } |
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