echarts - 删除图表中的一些系列标签
问题描述
我正在使用 echarts 显示堆积条形图。有 2 个系列的 360 数据点。我想显示系列标签，有 360 个标签，它们重叠，无法阅读标签。有没有办法自动调整显示的标签数量？例如，对于 360 个数据点，它应该只显示其中的 10 个标签。数据点的数量会发生变化，因此这必须是基于数据点数量的动态解决方案。
目前，标签如下所示：
highcharts 呈现相同的数据，如下所示：
我的图表选项：
chartOptions: {
tooltip: {
trigger: 'axis',
axisPointer: {
type: 'shadow'
}
},
grid: {
left: '3%',
right: '4%',
bottom: '3%',
containLabel: true
},
yAxis: {
type: 'value'
},
xAxis: {
type: 'category',
data: Array.from(Array(360).keys())
},
series: [
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name: 'Direct',
type: 'bar',
stack: 'total',
label: {
show: true
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emphasis: {
focus: 'series'
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79.34748427608929,
72.92987956141087,
66.47751282119475,
59.99019576113574,
53.4677390670015,
46.90995239910717,
40.316644386761936,
33.68762262268319,
27.022693657382206,
20.321662993519112,
13.584335080226992,
6.810513307404335
]
},
]
}
解决方案
这是我的解决方案，不确定是否有内置选项
修改 char 选项，以使用自定义格式化程序：
label: {
show: true,
formatter: myFormatter
},
实现自定义格式，这假设您总共需要 10 个标签 + 最后一个数据点的标签。size 是系列的大小（在我的例子中是 360）。
function myFormatter(params, size) {
if (params.dataIndex % Math.floor(size / 10) == 0 ||
params.dataIndex == size - 1) { // make sure we have a label for the last datapoint
return params.data
}
return ""
}
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