How to use scatter matrix chart to display data relationships in ECharts

How to use scatter matrix charts to display data relationships in ECharts requires specific code examples

ECharts (Enterprise Charts) is a product launched by Baidu based on HTML5 Canvas An open source library for data visualization that provides a wealth of chart types and interactive features. Among them, scatter matrix plot is a commonly used data visualization method that can visually display the relationship between multiple variables. This article will introduce how to use scatter matrix charts in ECharts to display data relationships and provide corresponding code examples.

1. Data preparation
First, we need to prepare the data to be displayed. Suppose we have a simple data set containing three variables X, Y, and Z, and each variable takes a value within a certain range. Arrays can be used to store these data, as shown below:

var data = [
  [1, 2, 3],
  [2, 3, 4],
  [3, 4, 5],
  // 更多数据...
];

In this example, each array represents a data point, and the elements in the array correspond to the values ​​of the variables X, Y, and Z in turn.

2. Create a scatter matrix chart
Next, we can use ECharts to create a scatter matrix chart. First, you need to introduce the resource file of ECharts, as shown below:

<script src="https://cdn.staticfile.org/echarts/4.8.0/echarts.min.js"></script>

Then, create a <div> element to accommodate the scatter matrix chart, and set the corresponding style and Size, as shown below:

<div id="scatterMatrix" style="width: 800px; height: 600px;"></div>

Next, use JavaScript code to initialize ECharts and configure the parameters of the scatter matrix chart, as shown below:

var scatterMatrix = echarts.init(document.getElementById('scatterMatrix'));
var option = {
  tooltip: {},
  xAxis: {},
  yAxis: {},
  series: [{
    type: 'scatter',
    data: data,
    symbolSize: 10,
  }]
};
scatterMatrix.setOption(option);

In this example, we use ECharts' scatter series type is used to create a scatter chart, and the data to be displayed is specified by setting the data attribute. At the same time, adjust the size of the scatter points by setting the symbolSize property.

3. Customized Scatter Matrix Chart
In addition to the basic scatter matrix chart, ECharts also provides a wealth of configuration items that can customize the scatter point style, color, etc. For example, we can specify different colors for different data points by setting the color attribute:

var option = {
  // ...
  series: [{
    type: 'scatter',
    data: data,
    symbolSize: 10,
    itemStyle: {
      color: function(params) {
        var value = params.data[2];
        if (value >= 0 && value < 3) {
          return 'red';
        } else if (value >= 3 && value < 6) {
          return 'blue';
        } else {
          return 'green';
        }
      }
    }
  }]
};

In this example, we set the color of the data points based on the value of the variable Z , set the data with values ​​in the range [0,3) to red, the data with values ​​in the range [3,6) to blue, and set other data to green.

4. Summary
This article introduces how to use scatter matrix charts to display data relationships in ECharts, and provides corresponding code examples. In addition to the basic scatter matrix chart, ECharts also provides a wealth of configuration items, and you can customize the style, color, etc. of the scatter points to meet different needs. By using ECharts, we can quickly and flexibly create various types of data visualization charts to help us better understand and analyze data.

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