multicategory-sorting.json

{
    "data": [{
        "x": [[1, 2, 3, 4, 5 ,6],
              [1, 2, 1, 2, 1 ,2]],
        "y":  [1, 2, 3, 4, 5 ,6]
    },

    {
        "x": [[1, 2, 3, 4, 5, 6],
              [1, 2, 1, 2, 1, 2]],
        "y":  [1, 2, 3, 4, 5, 6],
        "xaxis": "x2",
        "yaxis": "y2"
    },
    {
        "x": [[4, 5, 6, 7, 8, 9],
              [1, 2, 1, 2, 1, 2]],
        "y":  [1, 2, 3, 4, 5, 6],
        "xaxis": "x2",
        "yaxis": "y2"
    },

    {
        "x": [[1, 2, 3, 4, 5, 6, 4, 5, 6, 7, 8, 9],
              [1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2]],
        "y":  [1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6],
        "xaxis": "x3",
        "yaxis": "y3"
    },

    {
        "x": [[1, 2, 3, 4, 5, 6],
              [1, 2, 1, 2, null, 2]],
        "y":  [1, 2, 3, 4, 5, 6],
        "xaxis": "x4",
        "yaxis": "y4"
    },
    {
        "x": [[4, 5, 6, 7, 8, 9],
              [1, null, 1, 2, 1, 2]],
        "y":  [1, 2, 3, 4, 5, 6],
        "xaxis": "x4",
        "yaxis": "y4"
    }],
    "layout": {
        "grid": {"rows": 2, "columns": 2, "pattern": "independent", "xgap": 0.1, "ygap": 0.15},
        "width": 700,
        "height": 400,
        "margin": {"l": 20, "b": 40, "t": 20, "r": 20},
        "showlegend": false
    }
}