{ "$schema": "https://vega.github.io/schema/vega-lite/v4.json", "data": { "values": [ {"a": "B", "x": 2,"y": 2}, {"a": "A", "x": 1,"y": 1}, {"a": "A", "x": 4,"y": 4}, {"a": "B", "x": 5,"y": 5}, {"a": "C", "x": 3,"y": 3}, {"a": "C", "x": 6,"y": 6} ] }, "mark": "point", "encoding": { "x": {"field": "x", "type": "quantitative"}, "y": {"field": "y", "type": "quantitative"}, "color": {"field": "a", "type": "ordinal"} }}