{ "$schema": "https://vega.github.io/schema/vega-lite/v4.json", "data": {"url": "data/seattle-weather.csv"}, "mark": "bar", "encoding": { "x": { "timeUnit": "month", "field": "date", "type": "ordinal" }, "y": { "aggregate": "count", "type": "quantitative" }, "color": { "field": "weather", "type": "nominal" } }}