{ "$schema": "https://vega.github.io/schema/vega-lite/v4.json", "data": { "url": "https://vega.github.io/vega-lite/data/seattle-temps.csv" }, "encoding": { "x": { "field": "date", "timeUnit": "month", "type": "temporal" }, "y": { "aggregate": "mean", "field": "temp", "type": "quantitative" } }, "mark": { "interpolate": "monotone", "type": "line" } }