我正在使用Chart.js库创建折线图,由于需要大量标签,我已经使用Limit labels number on Chartjs line chart问题中的方法跳过了一些见下文。
我的图表看起来完全符合我的要求,只有一个例外: 在第二个标签正常的地方出现一条随机的黑线。
这是我用来创建此图表的代码:
Chart.defaults.global.elements.point.radius = 2;
var ctx = document.getElementById("graph-1-met");
var myLineChart = new Chart(ctx, {
type: 'line',
data: {
labels: [0,'','','','','',1,'','','','','',2,'','','','','',3,'','','','','',4,'','','','','',5,'','','','','',6,'','','','','',7,'','','','','',8,'','','','','',9,'','','','','',10,'','','','','',11,'','','','','',12,'','','','','',13,'','','','','',14,'','','','','',15,'','','','',''],
datasets: [
{
data: [65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55],
backgroundColor: "rgba(0,204,255,0.2)",
borderColor: "rgba(0,204,255,1)",
borderWidth: 2
}
]
},
options: {
legend: {
display: false
},
scales: {
xAxes: [{
scaleLabel: {
display: true,
labelString: 'Blowing Time (min)'
}
}],
yAxes: [{
ticks: {
beginAtZero:true
},
scaleLabel: {
display: true,
labelString: 'Undissolved Lime (tonnes)'
}
}]
}
}
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.2.1/Chart.min.js"></script>
<canvas id="graph-1-met"></canvas>
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我想注意一些事情:
[0,1,2,3,4,...]
),则黑线不会出现。这使我相信使用空字符串(''
)会出现问题。当我将标签更改为:[0,1,'','',...]
时,黑线现在会出现在第一次出现的''
上。在这种情况下,第三个标签位置。
为了解决问题,我尝试将网格线的颜色设置为白色,这导致黑线不再出现。不幸的是,这个解决方案使图表看起来更糟糕。
问题:为什么会出现这条黑线,是否有办法将其删除?
答案 0 :(得分:1)
好的,这可能很奇怪,但我刚刚从''
数组中移除了每个 labels
,它会像它应该的那样呈现。
<强> jsFiddle 强>
Chart.defaults.global.elements.point.radius = 2;
var ctx = document.getElementById("graph-1-met");
var myLineChart = new Chart(ctx, {
type: 'line',
data: {
labels: [0, , , , , 1, , , , , , 2, , , , , , 3, , , , , , 4, , , , , , 5, , , , , , 6, , , , , , 7, , , , , , 8, , , , , , 9, , , , , , 10, , , , , , 11, , , , , , 12, , , , , , 13, , , , , , 14, , , , , , 15, , , , , ],
datasets: [{
data: [65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55, 65, 59, 80, 81, 56, 55],
backgroundColor: "rgba(0,204,255,0.2)",
borderColor: "rgba(0,204,255,1)",
borderWidth: 2,
}]
},
options: {
legend: {
display: false
},
scales: {
xAxes: [{
scaleLabel: {
display: true,
labelString: 'Blowing Time (min)'
}
}],
yAxes: [{
ticks: {
beginAtZero: true
},
scaleLabel: {
display: true,
labelString: 'Undissolved Lime (tonnes)'
}
}]
}
}
});
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<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.2.1/Chart.min.js"></script>
<canvas id="graph-1-met"></canvas>
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