ECharts Sankey Rose Chart: How to show data flow and proportion

ECharts Sankey Rose Chart: How to display data flow and proportion, specific code examples are required

With the advent of the big data era, data analysis and visualization have become Important tool. As a powerful visualization library, ECharts provides a variety of chart types, one of which is the Sankey Rose chart. The Sankey Rose diagram is suitable for displaying data flow and proportion relationships in multiple dimensions. This article will introduce the basic concepts and usage of Sankey Rose Chart, and give specific code examples.

1. Basic concept of Sankey Rose Chart
   The Sankey Rose Chart is a special radar chart that represents different numerical values ​​through radii of different lengths, and represents different dimensions with angles. The radius of the graph represents the amount of data, while the angles of each dimension represent the categories of data. By connecting different dimensions, we can show the flow and proportion relationships between data.
2. Code example of Sankey Rose Chart
   The following is a simple code example of Sankey Rose Chart:

// 引入ECharts
var echarts = require('echarts');

// 初始化图表
var myChart = echarts.init(document.getElementById('chart'));

// 数据示例
var data = [
  { source: 'A', target: 'B', value: 100 },
  { source: 'A', target: 'C', value: 200 },
  { source: 'B', target: 'C', value: 150 },
];

// 将数据格式转换为桑基玫瑰图需要的格式
var seriesData = data.map(item => {
  return {
    name: item.source,
    type: 'sankey',
    data: [
      { name: item.source },
      { name: item.target },
    ],
    links: [
      { source: item.source, target: item.target, value: item.value },
    ],
  };
});

// 配置项
var option = {
  tooltip: {},
  series: seriesData,
};

// 渲染图表
myChart.setOption(option);

In the above code, we first introduce the ECharts library, and A chart instance is initialized. Then a simple data example is defined, including three nodes and two relationships. Next, we convert the data into the format required by the Sankey rose diagram, where the name attribute of the node represents the node name, and the links attribute represents the relationship between nodes.

Finally, we defined some styles and interactive behaviors through configuration items, and passed the data into the chart instance for rendering. On the page, the position of the chart can be specified by the id of a div element.

3. Usage Scenarios of Sankey Rose Chart
   Sankey Rose Chart is suitable for showing the data flow direction and proportion relationship between multiple dimensions. It is widely used in many fields, such as:

• Trade field: display the flow and proportion of goods between different countries;
• Website visit analysis: display The flow and proportion of jumps between different pages;
• Financial field: Shows the flow and proportion of transactions between different asset classes.

Through the Sankey Rose Chart, we can intuitively understand the relationship between data and help us make better decisions.

Summary:
This article introduces the basic concepts and usage of ECharts Sankey Rose Chart, and gives specific code examples. The Sankey Rose diagram is suitable for displaying data flow direction and proportional relationships, and represents the quantity and dimensions of data through radii and angles of different lengths. Using the ECharts library, we can easily implement the Sankey Rose Chart and use it in different application scenarios. I hope this article helps you understand and use the Sankey Rose Chart.

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