如何忽略ChartJs上相同的值？

var ctx = document.getElementById('myChart').getContext('2d');
var myChart = new Chart(ctx, {
    type: 'line',
    data: {
        labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
        datasets: [{
            label: 'Dataset',
            data: [10, null, 20, 30, null, 40, 50],
            skipNull: true, // 忽略空值
            borderColor: 'rgba(255, 99, 132, 1)',
            backgroundColor: 'rgba(255, 99, 132, 0.2)',
        }]
    },
    options: {
        // 图表配置选项
    }
});