Created
July 29, 2021 10:10
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Vega: Color Coded Parallel Coordinates
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{ | |
"$schema": "https://vega.github.io/schema/vega/v5.json", | |
"description": "Parallel coordinates plot showing 7 dimensions of automobile statistics.", | |
"width": 700, | |
"height": 400, | |
"padding": 5, | |
"config": { | |
"axisY": { | |
"titleX": -2, | |
"titleY": 410, | |
"titleAngle": 0, | |
"titleAlign": "right", | |
"titleBaseline": "top" | |
} | |
}, | |
"data": [ | |
{ | |
"name": "cars", | |
"url": "data/cars.json", | |
"format": { | |
"type": "json", | |
"parse": {"Year": "date:%Y-%m-%d"} | |
}, | |
"transform": [ | |
{ "type": "filter", "expr": "datum.Horsepower && datum.Miles_per_Gallon" }, | |
{ "type": "formula", "as": "Year", | |
"expr": "isNumber(datum.year) ? datum.year : year(datum.Year)" } | |
] | |
}, | |
{ | |
"name": "fields", | |
"values": [ | |
"Origin", | |
"Cylinders", | |
"Displacement", | |
"Weight_in_lbs", | |
"Horsepower", | |
"Acceleration", | |
"Miles_per_Gallon", | |
"Year" | |
] | |
} | |
], | |
"scales": [ | |
{ | |
"name": "ord", "type": "point", | |
"range": "width", "round": true, | |
"domain": {"data": "fields", "field": "data"} | |
}, | |
{ | |
"name": "Cylinders", "type": "linear", | |
"range": "height", "zero": false, "nice": true, | |
"domain": {"data": "cars", "field": "Cylinders"} | |
}, | |
{ | |
"name": "Displacement", "type": "linear", | |
"range": "height", "zero": false, "nice": true, | |
"domain": {"data": "cars", "field": "Displacement"} | |
}, | |
{ | |
"name": "Weight_in_lbs", "type": "linear", | |
"range": "height", "zero": false, "nice": true, | |
"domain": {"data": "cars", "field": "Weight_in_lbs"} | |
}, | |
{ | |
"name": "Horsepower", "type": "linear", | |
"range": "height", "zero": false, "nice": true, | |
"domain": {"data": "cars", "field": "Horsepower"} | |
}, | |
{ | |
"name": "Acceleration", "type": "linear", | |
"range": "height", "zero": false, "nice": true, | |
"domain": {"data": "cars", "field": "Acceleration"} | |
}, | |
{ | |
"name": "Miles_per_Gallon", "type": "linear", | |
"range": "height", "zero": false, "nice": true, | |
"domain": {"data": "cars", "field": "Miles_per_Gallon"} | |
}, | |
{ | |
"name": "Year", "type": "linear", | |
"range": "height", "zero": false, "nice": true, | |
"domain": {"data": "cars", "field": "Year"} | |
}, | |
{ | |
"name": "Origin", | |
"type": "band", | |
"domain": {"data": "cars", "field": "Origin"}, | |
"range": "height", | |
"padding": 1 | |
}, | |
{ | |
"name": "color", | |
"type": "linear", | |
"domain": {"data": "cars", "field": "Year"}, | |
"range": {"scheme": "viridis"}, | |
"reverse": true, | |
"interpolate": "hcl", | |
"zero": false | |
} | |
], | |
"axes": [ | |
{ | |
"orient": "left", "zindex": 1, | |
"scale": "Cylinders", "title": "Cylinders", | |
"offset": {"scale": "ord", "value": "Cylinders", "mult": -1} | |
}, | |
{ | |
"orient": "left", "zindex": 1, | |
"scale": "Displacement", "title": "Displacement", | |
"offset": {"scale": "ord", "value": "Displacement", "mult": -1} | |
}, | |
{ | |
"orient": "left", "zindex": 1, | |
"scale": "Weight_in_lbs", "title": "Weight_in_lbs", | |
"offset": {"scale": "ord", "value": "Weight_in_lbs", "mult": -1} | |
}, | |
{ | |
"orient": "left", "zindex": 1, | |
"scale": "Horsepower", "title": "Horsepower", | |
"offset": {"scale": "ord", "value": "Horsepower", "mult": -1} | |
}, | |
{ | |
"orient": "left", "zindex": 1, | |
"scale": "Acceleration", "title": "Acceleration", | |
"offset": {"scale": "ord", "value": "Acceleration", "mult": -1} | |
}, | |
{ | |
"orient": "left", "zindex": 1, | |
"scale": "Miles_per_Gallon", "title": "Miles_per_Gallon", | |
"offset": {"scale": "ord", "value": "Miles_per_Gallon", "mult": -1} | |
}, | |
{ | |
"orient": "left", "zindex": 1, | |
"scale": "Year", "title": "Year", "format": "d", | |
"offset": {"scale": "ord", "value": "Year", "mult": -1} | |
}, | |
{ | |
"orient": "left", | |
"scale": "Origin", "title": "Origin", | |
"labelPadding": 4, | |
"offset": {"scale": "ord", "value": "Origin", "mult": -1} | |
} | |
], | |
"marks": [ | |
{ | |
"type": "group", | |
"from": {"data": "cars"}, | |
"marks": [ | |
{ | |
"type": "line", | |
"from": {"data": "fields"}, | |
"encode": { | |
"enter": { | |
"x": {"scale": "ord", "field": "data"}, | |
"y": { | |
"scale": {"datum": "data"}, | |
"field": {"parent": {"datum": "data"}} | |
}, | |
"stroke": { | |
"scale": "color", | |
"field": {"parent": "Year"} | |
}, | |
"strokeWidth": {"value": 1.01}, | |
"strokeOpacity": {"value": 0.3} | |
} | |
} | |
} | |
] | |
} | |
], | |
"legends": [ | |
{ | |
"stroke": "color", | |
"title": "Horsepower" | |
} | |
] | |
} |
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