{
    "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
    "data": {
        "values": [
            {
                "variety": "Glabron",
                "yield": 32.4,
                "yieldError": 7.55,
                "yieldError2": -10.55
            },
            {
                "variety": "Manchuria",
                "yield": 30.97,
                "yieldError": 6.98,
                "yieldError2": -3.98
            },
            {
                "variety": "No. 457",
                "yield": 33.96,
                "yieldError": 3.92,
                "yieldError2": -0.92
            },
            {
                "variety": "No. 462",
                "yield": 30.45,
                "yieldError": 11.97,
                "yieldError2": -15.97
            }
        ]
    },
    "description": "Symetric error bars encoded with yError channel",
    "layer": [
        {
            "encoding": {
                "x": {
                    "field": "variety",
                    "type": "ordinal"
                },
                "y": {
                    "field": "yield",
                    "scale": {
                        "zero": false
                    },
                    "type": "quantitative"
                },
                "yError": {
                    "field": "yieldError"
                }
            },
            "mark": {
                "ticks": true,
                "type": "errorbar"
            }
        },
        {
            "encoding": {
                "x": {
                    "field": "variety",
                    "type": "ordinal"
                },
                "y": {
                    "field": "yield",
                    "type": "quantitative"
                }
            },
            "mark": {
                "color": "black",
                "filled": true,
                "type": "point"
            }
        }
    ]
}