ECharts tree diagram: how to display data hierarchical structure

ECharts tree diagram: How to display the data hierarchical structure, specific code examples are required

Introduction: With the rapid development of data visualization, people’s understanding and analysis capabilities of data Also improved. As a commonly used data visualization method, ECharts tree diagram can intuitively display the hierarchical structure of data. This article will introduce the basic usage of ECharts tree diagrams and give specific code examples.

1. Introduction to ECharts tree chart
ECharts is a JavaScript-based front-end chart library developed by Baidu, which can provide rich data visualization effects such as various charts and maps. The ECharts tree diagram is one of its core diagrams, used to display the hierarchical relationship of data, and is suitable for scenarios such as organizational structure and classification relationships.

2. Basic usage of ECharts tree diagram

1. Introduction of ECharts library
   To use ECharts tree diagram, you first need to introduce the ECharts library in the HTML file. This can be achieved through the following code:

   <script src="https://cdn.jsdelivr.net/npm/echarts@5.1.3/dist/echarts.min.js"></script>

2. Create container
   Create a container for displaying the tree diagram in the HTML file, for example:

   <div id="tree-chart" style="width: 800px; height: 600px;"></div>

3. Initialize ECharts instance
   In the JavaScript file, create an ECharts instance through the following code and bind it to the container:

   var treeChart = echarts.init(document.getElementById('tree-chart'));

4. Configure tree map parameters
   Specify parameters such as data and style through ECharts configuration items. The following is a simple example:

   var option = {
    series: [
        {
            type: 'tree',
            data: [
                {
                    name: 'A',
                    children: [
                        {
                            name: 'B',
                            children: [
                                { name: 'C' },
                                { name: 'D' }
                            ]
                        },
                        { name: 'E' }
                    ]
                }
            ]
        }
    ]
   };

   Among them, the data parameter is used to specify the data of the tree map. Each node consists of name and children attributes, name represents the node name, and children represents the collection of child nodes.

5. Rendering the tree map
   Finally, by calling the setOption method of the ECharts instance and passing in the configuration item parameters, the tree map is rendered on the page:

   treeChart.setOption(option);

3. Example Demonstration
Consider a simple organizational tree diagram, the code is as follows:

    
    <script src="https://cdn.jsdelivr.net/npm/echarts@5.1.3/dist/echarts.min.js"></script>


    <div id="tree-chart" style="width: 800px; height: 600px;"></div>
    <script>
        var treeChart = echarts.init(document.getElementById('tree-chart'));

        var option = {
            series: [
                {
                    type: 'tree',
                    data: [
                        {
                            name: 'CEO',
                            children: [
                                {
                                    name: 'CTO',
                                    children: [
                                        { name: 'Engineer' },
                                        { name: 'Designer' }
                                    ]
                                },
                                {
                                    name: 'CFO',
                                    children: [
                                        { name: 'Accountant' },
                                        { name: 'Treasury' }
                                    ]
                                }
                            ]
                        }
                    ]
                }
            ]
        };

        treeChart.setOption(option);
    </script>

In the above code, we created a simple organization Structure tree diagram. The root node is CEO and contains two sub-nodes, CTO and CFO. Under the CTO node there are two sub-nodes Engineer and Designer. Under the CFO node there are two sub-nodes Accountant and Treasury. Through the above code, we can get a tree diagram showing the organizational structure.

Conclusion:
This article introduces the basic usage of ECharts tree diagram and gives an example. Through the configuration items of ECharts, we can flexibly define the data and style of the tree map to achieve the data level display requirements in various scenarios. I hope this article can help readers understand and use ECharts tree diagrams.

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