{
    "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
    "description": "Scatterplot matrix",
    "repeat": {
        "column": [
            "Miles_per_Gallon",
            "Acceleration",
            "Horsepower"
        ],
        "row": [
            "Horsepower",
            "Acceleration",
            "Miles_per_Gallon"
        ]
    },
    "spec": {
        "data": {
            "url": "https://vega.github.io/vega-lite/data/cars.json"
        },
        "encoding": {
            "color": {
                "condition": {
                    "field": "Origin",
                    "selection": "myBrush",
                    "type": "nominal"
                },
                "value": "grey"
            },
            "x": {
                "field": {
                    "repeat": "column"
                },
                "type": "quantitative"
            },
            "y": {
                "field": {
                    "repeat": "row"
                },
                "type": "quantitative"
            }
        },
        "mark": "point",
        "selection": {
            "grid": {
                "bind": "scales",
                "resolve": "global",
                "translate": "[mousedown[!event.shiftKey], window:mouseup] > window:mousemove!",
                "type": "interval",
                "zoom": "wheel![event.shiftKey]"
            },
            "myBrush": {
                "on": "[mousedown[event.shiftKey], window:mouseup] > window:mousemove!",
                "resolve": "union",
                "translate": "[mousedown[event.shiftKey], window:mouseup] > window:mousemove!",
                "type": "interval",
                "zoom": "wheel![event.shiftKey]"
            }
        }
    }
}