打印设置空值的颜色。js公司

<script src="https://cdn.plot.ly/plotly-latest.js" ></script>
<div id="myDiv" style="width:100%;height:100%" ></div>
<script>
    var color_scale = [[0, "#ff0000"], [1, "#00ff00"]];
    var trace = {
        x: [1, 2, 3, 4],
        y: [10, 15, 13, 17],
        marker: {
            color: [1, 2, 3, null],
            colorscale: color_scale
        },
        mode: 'markers',
        type: 'scatter'
    };

    var data = [trace];

    Plotly.newPlot('myDiv', data);
</script>