Chartjs-Chart.js line graph change x axis seperation

I think you need to specify your x-axis as using the type of time.

Try something like this…

var ctx = $("#mycanvas");
        var LineGraph = new Chart(ctx,
        {
            type: 'line',
            data: chartdata,
            options: {
               scales: {
                   xAxes: [
                     {
                        type: "time",
                        time: {
                           format: timeFormat,
                           round: 'minute',
                        }
                     }],
               },
            }
        });