本文介绍了如何使用 chart.js 创建两个 x 轴标签的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
有一种方法可以为 y 轴创建两个标签.但是如何在 chart.js 中制作多个 x 轴标签?例如:如图所示的示例:如何对(两级)轴标签进行分组
There is a way to create two label for y-axes. But how do you make a multiple x-axes label in chart.js? eg: example as in this picture: How to group (two-level) axis labels
推荐答案
这个问题已经在github上回答了这里
This question has already been answered on github here
这是一个有效的 JSFiddle
var ctx = $("#c");
var myChart = new Chart(ctx, {
type: 'line',
data: {
labels: ["January;2015", "February;2015", "March;2015", "January;2016", "February;2016", "March;2016"],
datasets: [{
label: '# of Votes',
xAxisID:'xAxis1',
data: [12, 19, 3, 5, 2, 3]
}]
},
options:{
scales:{
xAxes:[
{
id:'xAxis1',
type:"category",
ticks:{
callback:function(label){
var month = label.split(";")[0];
var year = label.split(";")[1];
return month;
}
}
},
{
id:'xAxis2',
type:"category",
gridLines: {
drawOnChartArea: false, // only want the grid lines for one axis to show up
},
ticks:{
callback:function(label){
var month = label.split(";")[0];
var year = label.split(";")[1];
if(month === "February"){
return year;
}else{
return "";
}
}
}
}],
yAxes:[{
ticks:{
beginAtZero:true
}
}]
}
}
});
<body>
<canvas id="c" width="400" height="300"></canvas>
<script src="https://code.jquery.com/jquery-2.2.0.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.11.2/moment.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.2/Chart.min.js"></script>
</body>
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