There is “undefined” in my chart created by chart.js

    function arrangeForGraph(counts){
        for(var i =0;i<counts.length;i++){
                var divname = document.createElement("div");
                divname.id="div"+i;
                divname.class="chartAreaWrapper;chart";
        var dataname = document.createElement("data");
                var _canvas = document.createElement("canvas");
                _canvas.id="canvas"+i;
                _canvas.height="400";
                _canvas.width="600";
                _label_list = counts[i][4];
        dataname.id=_label_list;
        dataname.value= counts[i][0];
        dataname.style="display:none;"
        dataname.title="countchart"; 
        dataname.text="countsch";
                var ctx = _canvas.getContext("2d");
        ctx.imageSmoothingEnabled = true;
        Chart.plugins.register({id: 'pan', id:'zoom'});
                var myChart = new Chart(ctx, {
                    type: 'line',
                    data: {
                        labels: _label_list,
                        datasets: [
                            {
                                label: "Upper Bound",
                                data: counts[i][3],
                                backgroundColor: ['rgba(150, 150, 150, 0.50)'],
                                borderColor: ['rgba(150, 150, 150, 0.50)'],
                                borderWidth: 0.5,
                                pointRadius: 1,
                                fill: 1,
                            },
                            {
                                label: "Lower Bound",
                                data: counts[i][1],
                                backgroundColor: ['rgba(150, 150, 150, 0.50)'],
                                borderColor: ['rgba(150, 150, 150, 0.50)'],
                                borderWidth: 0.5,
                                pointRadius: 1,
                                fill: false,
                            },
                            {
                                label: "Value",
                                order: 1,
                                data: counts[i][0],
                                backgroundColor: 'rgba(75, 192, 192, 0.85)',
                                borderColor: 'rgba(75, 192, 192, 0.85)',
                                borderWidth: 2,
                                pointRadius: 3,
                                fill: false,
                            },
                {
                                label: "Prediction",
                                order: 1,
                                data: counts[i][2],
                                backgroundColor: 'rgba(100, 100, 100, 0.85)',
                                borderColor: 'rgba(100, 100, 100, 0.85)',
                                borderWidth: 2,
                                pointRadius: 3,
                                fill: false,
                            },
                        ]
                    },
                    options: {
            
                                pan: {
                                 enabled: true,
                                 mode: 'xy'
                                 },
                                zoom: {
                                 enabled: true,
                                 drag: true,
                                 speed: 0.1,
                                 threshold: 2,
                                 mode: 'xy'
                                },
            title:{
                  text: "Behaviours",
                  display: true,
                      fontSize: 15
                },
            legend: {
                    display: false},
            elements: {center:{}},
                        responsive: true,
                        scales: {
                            xAxes: [{scaleLabel: {display: true, labelString: 'Date & Time'}}],
                            yAxes: [{scaleLabel: {display: true, labelString: 'Parameter Values'},ticks: {beginAtZero: true}}]
                        }
                    },
                });console.log(myChart);
        document.getElementById("main2").appendChild(divname);
        document.getElementById(divname.id).appendChild(_canvas);
        document.getElementById(_canvas.id).appendChild(dataname);
            };

}