feat: add exponential moving average to vega-lite #9225
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,137 @@ | ||
| { | ||
| "$schema": "https://vega.github.io/schema/vega/v5.json", | ||
| "background": "white", | ||
| "padding": 5, | ||
| "width": 400, | ||
| "height": 200, | ||
| "style": "cell", | ||
| "data": [ | ||
| { | ||
| "name": "source_0", | ||
| "values": [ | ||
| {"price": 9.2, "year": 2020}, | ||
| {"price": 10.76, "year": 2020}, | ||
| {"price": 36.88, "year": 2021}, | ||
| {"price": 3.44, "year": 2021}, | ||
| {"price": 10.55, "year": 2022}, | ||
| {"price": 9.65, "year": 2022}, | ||
| {"price": 7.15, "year": 2023}, | ||
| {"price": 15, "year": 2023}, | ||
| {"price": 10.19, "year": 2024}, | ||
| {"price": 8.86, "year": 2024} | ||
| ] | ||
| }, | ||
| { | ||
| "name": "data_0", | ||
| "source": "source_0", | ||
| "transform": [ | ||
| { | ||
| "type": "aggregate", | ||
| "groupby": ["year"], | ||
| "ops": ["exponential", "mean"], | ||
| "fields": ["price", "price"], | ||
| "as": ["exponential_price", "mean_price"], | ||
| "aggregate_params": [0.5, null] | ||
| } | ||
| ] | ||
| } | ||
| ], | ||
| "marks": [ | ||
| { | ||
| "name": "layer_0_marks", | ||
| "type": "line", | ||
| "style": ["line"], | ||
| "sort": {"field": "datum[\"year\"]"}, | ||
| "from": {"data": "data_0"}, | ||
| "encode": { | ||
| "update": { | ||
| "stroke": {"value": "#4c78a8"}, | ||
| "description": { | ||
| "signal": "\"year: \" + (isValid(datum[\"year\"]) ? datum[\"year\"] : \"\"+datum[\"year\"]) + \"; Avg Price: \" + (format(datum[\"mean_price\"], \"\"))" | ||
| }, | ||
| "x": {"scale": "x", "field": "year"}, | ||
| "y": {"scale": "y", "field": "mean_price"}, | ||
| "defined": { | ||
| "signal": "isValid(datum[\"mean_price\"]) && isFinite(+datum[\"mean_price\"])" | ||
| } | ||
| } | ||
| } | ||
| }, | ||
| { | ||
| "name": "layer_1_marks", | ||
| "type": "line", | ||
| "style": ["line"], | ||
| "sort": {"field": "datum[\"year\"]"}, | ||
| "from": {"data": "data_0"}, | ||
| "encode": { | ||
| "update": { | ||
| "opacity": {"value": 0.5}, | ||
| "stroke": {"value": "#4c78a8"}, | ||
| "description": { | ||
| "signal": "\"year: \" + (isValid(datum[\"year\"]) ? datum[\"year\"] : \"\"+datum[\"year\"]) + \"; Exponential of price: \" + (format(datum[\"exponential_price\"], \"\"))" | ||
| }, | ||
| "x": {"scale": "x", "field": "year"}, | ||
| "y": {"scale": "y", "field": "exponential_price"}, | ||
| "defined": { | ||
| "signal": "isValid(datum[\"exponential_price\"]) && isFinite(+datum[\"exponential_price\"])" | ||
| } | ||
| } | ||
| } | ||
| } | ||
| ], | ||
| "scales": [ | ||
| { | ||
| "name": "x", | ||
| "type": "point", | ||
| "domain": {"data": "data_0", "field": "year", "sort": true}, | ||
| "range": [0, {"signal": "width"}], | ||
| "padding": 0.5 | ||
| }, | ||
| { | ||
| "name": "y", | ||
| "type": "linear", | ||
| "domain": { | ||
| "data": "data_0", | ||
| "fields": ["mean_price", "exponential_price"] | ||
| }, | ||
| "range": [{"signal": "height"}, 0], | ||
| "nice": true, | ||
| "zero": true | ||
| } | ||
| ], | ||
| "axes": [ | ||
| { | ||
| "scale": "y", | ||
| "orient": "left", | ||
| "gridScale": "x", | ||
| "grid": true, | ||
| "tickCount": {"signal": "ceil(height/40)"}, | ||
| "domain": false, | ||
| "labels": false, | ||
| "aria": false, | ||
| "maxExtent": 0, | ||
| "minExtent": 0, | ||
| "ticks": false, | ||
| "zindex": 0 | ||
| }, | ||
| { | ||
| "scale": "x", | ||
| "orient": "bottom", | ||
| "grid": false, | ||
| "title": "year", | ||
| "labelAlign": "right", | ||
| "labelAngle": 270, | ||
| "labelBaseline": "middle", | ||
| "zindex": 0 | ||
| }, | ||
| { | ||
| "scale": "y", | ||
| "orient": "left", | ||
| "grid": false, | ||
| "title": "Avg Price", | ||
| "labelOverlap": true, | ||
| "tickCount": {"signal": "ceil(height/40)"}, | ||
| "zindex": 0 | ||
| } | ||
| ] | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| { | ||
| "$schema": "https://vega.github.io/schema/vega-lite/v5.json", | ||
| "width": 400, | ||
| "data": { | ||
| "values": [ | ||
| {"price": 9.2, "year": 2020}, | ||
| {"price": 10.76, "year": 2020}, | ||
| {"price": 36.88, "year": 2021}, | ||
| {"price": 3.44, "year": 2021}, | ||
| {"price": 10.55, "year": 2022}, | ||
| {"price": 9.65, "year": 2022}, | ||
| {"price": 7.15, "year": 2023}, | ||
| {"price": 15.0, "year": 2023}, | ||
| {"price": 10.19, "year": 2024}, | ||
| {"price": 8.86, "year": 2024} | ||
| ] | ||
|
There was a problem hiding this comment. Originally, I was planning on using some advanced data like Since the created spec in 
|
||
| }, | ||
| "layer": [ | ||
| { | ||
| "mark": "line", | ||
| "encoding": { | ||
| "x": { | ||
| "field": "year" | ||
| }, | ||
| "y": { | ||
| "field": "price", | ||
| "aggregate": "mean", | ||
| "type": "quantitative", | ||
| "title": "Avg Price" | ||
| } | ||
| } | ||
| }, | ||
| { | ||
| "mark": { | ||
| "type": "line", | ||
| "opacity": 0.5 | ||
| }, | ||
| "encoding": { | ||
| "x": { | ||
| "field": "year" | ||
| }, | ||
| "y": { | ||
| "field": "price", | ||
| "aggregate": { | ||
| "exponential": 0.5 | ||
| }, | ||
| "type": "quantitative" | ||
| } | ||
| } | ||
| } | ||
| ] | ||
| } | ||
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Did you test the docs as well? I see we use
AggregateOpin https://github.com/julieg18/vega-lite/blob/261728bbeadb674041266dc3276ffd46a4c7510d/site/_data/link.yml#L61 so we need to make sure the links are still correct.