{ "$schema": "https://vega.github.io/schema/vega-lite/v4.json", "data": {"url": "data/cars.json"}, "mark": "bar", "encoding": { "x": { "bin": {"maxbins": 15}, "field": "Horsepower", "type": "quantitative" }, "y": { "aggregate": "count", "type": "quantitative" }, "row": {"field": "Origin"} }}