ChartJS 社区您好!
我希望有人已经弄清楚如何在 ChartJS 条形图中正确排序集群内的“数据集”。下面是 ChartJS 中的条形图示例,其中包含多个“数据集”,每个数据集都有自己的标签,与图例中的颜色/项目相对应。
这是原始图表的图像。在每个聚类中,受访者 1 始终位于第一位置,受访者 2 位于第二位置,受访者 3 位于第三位置。
我想要做的是保留X轴(按“报告周期”排序),同时让每个X轴间隔或组内的数据点按升序或降序排序。
我尝试过的方法:
data
属性以匹配 object
结构选项dataset
数组中的每个datasets
中使用单一数据对象和“解析”属性
datasets
数组以隔离具有相同 dataset
的多个
label
我在前两次尝试中发现,通过这些方法,与每个“数据集”关联的每个条形的位置将始终遵循其组内
datasets
数组中每个数据集的排序(即 datasetIndex)。 ..
我发现第三次尝试实现了所需的排序,但该操作会导致冗余的图例标签。
这是所需排序的图像(在每个簇中升序)
这是“原始”显示数据的样子 图表数据
{
"datasets": [
{
"label": "Respondent 1",
"data": [
750,
null,
null,
null
],
"borderRadius": 5,
"backgroundColor": "#1E81D3",
"borderColor": "#ccc",
"spanGaps": true,
"order": 0
},
{
"label": "Respondent 2",
"data": [
null,
33921,
100001,
3999
],
"borderRadius": 5,
"backgroundColor": "#063F84",
"borderColor": "#ccc",
"spanGaps": true,
"order": 1
},
{
"label": "Respondent 3",
"data": [
null,
419,
21583,
488
],
"borderRadius": 5,
"backgroundColor": "#0D5AB7",
"borderColor": "#ccc",
"spanGaps": true,
"order": 2
}
],
"labels": [
"2017 Fiscal Year (Jul-Jun) - H2",
"2022 Fiscal Year (Jan-Dec) - H2",
"2023 Fiscal Year (Jan-Dec) - H1",
"2023 Fiscal Year (Jan-Dec) - H2"
],
"yAxisLabel": "Cubic Meters"
}
这是采用后的数据(上面概述的第三次尝试)
{
"datasets": [
{
"label": "Respondent 1",
"data": [
750,
null,
null,
null
],
"backgroundColor": "#1E81D3",
"borderColor": "#ccc",
"borderRadius": 5
},
{
"label": "Respondent 3",
"data": [
null,
419,
null,
null
],
"backgroundColor": "#0D5AB7",
"borderColor": "#ccc",
"borderRadius": 5
},
{
"label": "Respondent 2",
"data": [
null,
33921,
null,
null
],
"backgroundColor": "#063F84",
"borderColor": "#ccc",
"borderRadius": 5
},
{
"label": "Respondent 3",
"data": [
null,
null,
21583,
null
],
"backgroundColor": "#0D5AB7",
"borderColor": "#ccc",
"borderRadius": 5
},
{
"label": "Respondent 2",
"data": [
null,
null,
100001,
null
],
"backgroundColor": "#063F84",
"borderColor": "#ccc",
"borderRadius": 5
},
{
"label": "Respondent 3",
"data": [
null,
null,
null,
488
],
"backgroundColor": "#0D5AB7",
"borderColor": "#ccc",
"borderRadius": 5
},
{
"label": "Respondent 2",
"data": [
null,
null,
null,
3999
],
"backgroundColor": "#063F84",
"borderColor": "#ccc",
"borderRadius": 5
}
],
"labels": [
"2017 Fiscal Year (Jul-Jun) - H2",
"2022 Fiscal Year (Jan-Dec) - H2",
"2023 Fiscal Year (Jan-Dec) - H1",
"2023 Fiscal Year (Jan-Dec) - H2"
],
"yAxisLabel": "Cubic Meters"
}
毕竟,我想一定有更好的方法......
我进行了一些小研究,如果您希望对这些集群的每年部分的数据条进行排序,您需要预先定义数据集并按如下方式排序:
const chartData = {
datasets: [
{
label: "Respondent 1",
data: [750, 700, null, null],
backgroundColor: "#1E81D3",
borderColor: "#ccc",
borderRadius: 5
},
{
label: "Respondent 3",
data: [null, 419, null, null],
backgroundColor: "#0D5AB7",
borderColor: "#ccc",
borderRadius: 5
},
{
label: "Respondent 2",
data: [null, 33921, null, null],
backgroundColor: "#063F84",
borderColor: "#ccc",
borderRadius: 5
},
{
label: "Respondent 3",
data: [null, null, 21583, null],
backgroundColor: "#0D5AB7",
borderColor: "#ccc",
borderRadius: 5
},
{
label: "Respondent 2",
data: [null, null, 20001, null],
backgroundColor: "#063F84",
borderColor: "#ccc",
borderRadius: 5
},
{
label: "Respondent 3",
data: [null, null, null, 488],
backgroundColor: "#0D5AB7",
borderColor: "#ccc",
borderRadius: 5
},
{
label: "Respondent 2",
data: [null, null, null, 3999],
backgroundColor: "#063F84",
borderColor: "#ccc",
borderRadius: 5
}
],
labels: [
"2017 Fiscal Year (Jul-Jun) - H2",
"2022 Fiscal Year (Jan-Dec) - H2",
"2023 Fiscal Year (Jan-Dec) - H1",
"2023 Fiscal Year (Jan-Dec) - H2"
],
yAxisLabel: "Cubic Meters"
};
// Sort datasets based on the sum of their `data` values
chartData.datasets.sort((a, b) => {
const sumA = a.data.reduce((sum, val) => sum + (val || 0), 0); // Calculate sum of dataset A
const sumB = b.data.reduce((sum, val) => sum + (val || 0), 0); // Calculate sum of dataset B
return sumB - sumA; // Sort in descending order
});
如果我正确理解你的问题,这可能是解决方案,如果不是,请澄清答案有什么问题。