Created
June 1, 2017 12:46
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Scale a Vega area marker
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| { | |
| "$schema": "https://vega.github.io/schema/vega/v3.0.json", | |
| "width": 800, | |
| "height": 400, | |
| "padding": 5, | |
| "signals": [ | |
| { | |
| "name": "defined", "value": true, | |
| "bind": {"input": "checkbox"} | |
| }, | |
| { | |
| "name": "interpolate", "value": "linear", | |
| "bind": { | |
| "input": "select", | |
| "options": [ | |
| "basis", | |
| "cardinal", | |
| "catmull-rom", | |
| "linear", | |
| "monotone", | |
| "natural", | |
| "step", | |
| "step-after", | |
| "step-before" | |
| ] | |
| } | |
| }, | |
| { | |
| "name": "tension", "value": 0, | |
| "bind": {"input": "range", "min": 0, "max": 1, "step": 0.05} | |
| }, | |
| { | |
| "name": "w", "value": 300, | |
| "bind": {"input": "range", "min": 100, "max": 800, "step": 1} | |
| }, | |
| { | |
| "name": "h", "value": 400, | |
| "bind": {"input": "range", "min": 10, "max": 400, "step": 1} | |
| } | |
| ], | |
| "data": [ | |
| { | |
| "name": "table", | |
| "values": [ | |
| {"u": 1, "v": 28}, {"u": 2, "v": 55}, | |
| {"u": 3, "v": 42}, {"u": 4, "v": 34}, | |
| {"u": 5, "v": 36}, {"u": 6, "v": 48} | |
| ] | |
| } | |
| ], | |
| "scales": [ | |
| { | |
| "name": "xscale", | |
| "type": "linear", | |
| "range": {"signal": "[0,w]" }, | |
| "zero": false, | |
| "domain": {"data": "table", "field": "u"} | |
| }, | |
| { | |
| "name": "yscale", | |
| "type": "linear", | |
| "range": {"signal": "[h,0]" }, | |
| "nice": true, | |
| "zero": true, | |
| "domain": {"data": "table", "field": "v"} | |
| } | |
| ], | |
| "marks": [ | |
| { | |
| "type": "area", | |
| "from": {"data": "table"}, | |
| "encode": { | |
| "enter": { | |
| "fill": {"value": "blue"} | |
| }, | |
| "update": { | |
| "x": {"scale": "xscale", "field": "u"}, | |
| "y": {"scale": "yscale", "field": "v"}, | |
| "y2": {"scale": "yscale", "value": "0"}, | |
| "defined": {"signal": "defined || datum.u !== 3"}, | |
| "interpolate": {"signal": "interpolate"}, | |
| "tension": {"signal": "tension"}, | |
| "opacity": {"value": 1} | |
| }, | |
| "hover": { | |
| "opacity": {"value": 0.5} | |
| } | |
| } | |
| } | |
| ] | |
| } |
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| <!doctype html> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Vega scale area marker</title> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/vega/3.0.0-beta.32/vega.js"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/vega-lite/2.0.0-beta.3/vega-lite.js"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/vega-embed/3.0.0-beta.14/vega-embed.js"></script> | |
| </head> | |
| <body> | |
| <div id="vis"></div> | |
| <script> | |
| var opt = { | |
| "renderer" : "svg", | |
| "actions" : {export: true, source: false, editor: false}, | |
| } | |
| vega.embed('#vis', 'area.json', opt); | |
| </script> | |
| </body> | |
| </html> |
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