Chart.js图例文本显示未定义

我试图在chart.js中显示四个带有图例的水平条。但是图例文字显示的每种情况都不确定。如何在chart.js中定义或声明图例的文本？

我的html代码：

    

        
Name
        
chocolates
        
    
    

        
Bauxite
        
P&B Dispatch
        
    

我的Javascript代码：

Charts.prototype.initBarHorizOntal= function () {
    var ctxD = $("#barChartHDark"), chartData = {
        type: 'horizontalBar',
        data: {
            labels: ["Today", "Last week", "Last month", "Last Year"],
            datasets: [{
                    data: [7, 59, 68, 26],
                    backgroundColor: this.colors[0],
                    hoverBackgroundColor: this.convertHex(this.colors[0], 70),
                },
                {
                    data: [, 23, 44, 30],
                    backgroundColor: this.colors[1],
                    hoverBackgroundColor: this.convertHex(this.colors[1], 70),
},
                {
                    data: [, 3, -7, 1],
                    backgroundColor: this.colors[2],
                    hoverBackgroundColor: this.convertHex(this.colors[2], 70),
                }]
        },
        options: {
            barThickness: 1,
            scales: {
                xAxes: [{
                        stacked: true,
                        ticks: {
                            fontColor: this.tickColor
                        },
                        gridLines: {
                            drawOnChartArea: false
                        }
                    }],
                yAxes: [{
                        stacked: true,
                        ticks: {
                            fontColor: this.tickColor,
                            min: 0,
                            max: 175,
                            stepSize: 25
                        }
                    }]
            },
            labels: ['Current data','Vs last week/month/year','Change'],
            name: ['Current data','Vs last week/month/year','Change'],
            legend: {
                display: true,
                legendText : ['Current','Vs last week/month/year','% Change']
                    },     
        }
    }, myDarkRadarChart = new Chart(ctxD, chartData), myLightRadarChart = new Chart(ctxL, chartData);
};

它给出如下输出：

如何更改顶部显示为“ undefined”的文本？