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| license: bsd-3-clause |
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://cdn.jsdelivr.net/npm/vega@5"></script> | |
| <script src="https://cdn.jsdelivr.net/npm/vega-embed@4"></script> | |
| </head> | |
| <body> | |
| <p> | |
| Click and drag anywhere in the chart to set the average. | |
| </p> | |
| <div id="vis"></div> | |
| <script> | |
| const spec = "line.json"; | |
| vegaEmbed('#vis', spec, {actions: false}) | |
| // result.view provides access to the Vega View API | |
| .then(result => { | |
| result.view.addSignalListener("average", console.log); | |
| }) | |
| .catch(console.warn); | |
| </script> | |
| </body> |
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| { | |
| "$schema": "https://vega.github.io/schema/vega/v5.json", | |
| "width": 500, | |
| "height": 200, | |
| "padding": 10, | |
| "signals": [{ | |
| "name": "average", | |
| "value": 0, | |
| "on": [{ | |
| "events": "mousedown, [mousedown, mouseup] > mousemove!", | |
| "update": "invert('y', clamp(y(), 0, height))" | |
| }] | |
| }], | |
| "data": [ | |
| { | |
| "name": "table", | |
| "values": [ | |
| {"x": 0, "y": 28}, | |
| {"x": 1, "y": 43}, | |
| {"x": 2, "y": 81}, | |
| {"x": 3, "y": 19}, | |
| {"x": 4, "y": 52}, | |
| {"x": 5, "y": 24}, | |
| {"x": 6, "y": 87}, | |
| {"x": 7, "y": 17}, | |
| {"x": 8, "y": 68}, | |
| {"x": 9, "y": 49} | |
| ] | |
| } | |
| ], | |
| "scales": [ | |
| { | |
| "name": "x", | |
| "type": "point", | |
| "range": "width", | |
| "domain": {"data": "table", "field": "x"} | |
| }, | |
| { | |
| "name": "y", | |
| "type": "linear", | |
| "range": "height", | |
| "nice": true, | |
| "zero": true, | |
| "domain": {"data": "table", "field": "y"} | |
| } | |
| ], | |
| "axes": [ | |
| {"orient": "bottom", "scale": "x", "ticks": false, "labels": false}, | |
| {"orient": "left", "scale": "y", "ticks": false, "labels": false} | |
| ], | |
| "marks": [ | |
| { | |
| "type": "rect", | |
| "encode": { | |
| "enter": { | |
| "cursor": {"value": "pointer"}, | |
| "x": {"value": 0}, | |
| "x2": {"signal": "width"}, | |
| "y": {"value": 0}, | |
| "y2": {"signal": "height"}, | |
| "fill": {"value": "transparent"} | |
| } | |
| } | |
| }, | |
| { | |
| "type": "line", | |
| "from": {"data": "table"}, | |
| "encode": { | |
| "enter": { | |
| "x": {"scale": "x", "field": "x"}, | |
| "y": {"scale": "y", "field": "y"}, | |
| "stroke": {"value": "steelblue"}, | |
| "strokeWidth": {"value": 2}, | |
| "cursor": {"value": "pointer"} | |
| } | |
| } | |
| }, { | |
| "type": "rule", | |
| "encode": { | |
| "update": { | |
| "x": {"value": 0}, | |
| "x2": {"signal": "width"}, | |
| "y": {"signal": "average", "scale": "y"}, | |
| "stroke": {"value": "firebrick"}, | |
| "strokeWidth": {"value": 2}, | |
| "cursor": {"value": "pointer"} | |
| } | |
| } | |
| }, { | |
| "type": "text", | |
| "encode": { | |
| "update": { | |
| "x": {"value": 5}, | |
| "y": { | |
| "signal": "average", | |
| "scale": "y", | |
| "offset": -2 | |
| }, | |
| "text": {"value": "Estimated Average"}, | |
| "stroke": {"value": "firebrick"}, | |
| "cursor": {"value": "pointer"} | |
| } | |
| } | |
| } | |
| ] | |
| } |
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