{ "$schema": "https://vega.github.io/schema/vega-lite/v4.json", "description": "Plot showing average data with raw values in the background.", "data": {"url": "data/stocks.csv"}, "transform": [{"filter": "datum.symbol==='GOOG'"}], "layer": [{ "mark": {"type": "point", "opacity": 0.3}, "encoding": { "x": {"timeUnit":"year", "field": "date"}, "y": {"field": "price", "type": "quantitative"} } }, { "mark": "line", "encoding": { "x": {"timeUnit":"year", "field": "date"}, "y": {"aggregate": "mean", "field": "price"} } }]}