{ "$schema": "https://vega.github.io/schema/vega-lite/v4.json", "title": "Distribution of Body Mass of Penguins", "width": 400, "height": 80, "data": { "url": "data/penguins.json" }, "mark": "area", "transform": [ { "density": "Body Mass (g)", "groupby": ["Species"], "extent": [2500, 6500] } ], "encoding": { "x": {"field": "value", "type": "quantitative", "title": "Body Mass (g)"}, "y": {"field": "density", "type": "quantitative", "stack": "zero"}, "row": {"field": "Species"} }}