vue と Element-plus を使用してデータの統計と分析を実装する方法

# 安装Vue CLI
npm install -g @vue/cli

# 创建一个Vue项目
vue create data-analysis

# 进入项目目录
cd data-analysis

# 安装Element Plus
npm install element-plus@next --save

// data.json
{
  "users": [
    {
      "id": 1,
      "name": "张三",
      "age": 20,
      "gender": "男"
    },
    {
      "id": 2,
      "name": "李四",
      "age": 25,
      "gender": "女"
    },
    {
      "id": 3,
      "name": "王五",
      "age": 30,
      "gender": "男"
    }
  ]
}

<template>
  <el-table :data="users" style="width: 100%">
    <el-table-column prop="name" label="姓名"></el-table-column>
    <el-table-column prop="age" label="年龄"></el-table-column>
    <el-table-column prop="gender" label="性别"></el-table-column>
  </el-table>
</template>

<script>
export default {
  data() {
    return {
      users: []
    };
  },
  mounted() {
    // 获取数据
    this.users = require("./data.json").users;
  }
};
</script>

<template>
  <div>
    <h1>用户统计</h1>
    <p>用户人数：{{ userCount }}</p>
    <p>平均年龄：{{ avgAge }}</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      users: []
    };
  },
  computed: {
    userCount() {
      return this.users.length;
    },
    avgAge() {
      let totalAge = 0;
      for (let user of this.users) {
        totalAge += user.age;
      }
      return totalAge / this.users.length;
    }
  },
  mounted() {
    // 获取数据
    this.users = require("./data.json").users;
  }
};
</script>

npm install vue-echarts echarts --save

<template>
  <el-card>
    <div style="height: 400px">
      <chart :options="chartOptions" />
    </div>
  </el-card>
</template>

<script>
import { reactive } from "vue";
import Chart from "vue-echarts";

export default {
  components: {
    Chart
  },
  data() {
    return {
      users: [],
      chartOptions: reactive({
        xAxis: {
          type: "category",
          data: []
        },
        yAxis: {
          type: "value"
        },
        series: [
          {
            data: [],
            type: "bar"
          }
        ]
      })
    };
  },
  mounted() {
    // 获取数据
    this.users = require("./data.json").users;

    // 统计性别人数
    let genders = {};
    for (let user of this.users) {
      if (genders[user.gender]) {
        genders[user.gender]++;
      } else {
        genders[user.gender] = 1;
      }
    }
    this.chartOptions.xAxis.data = Object.keys(genders);
    this.chartOptions.series[0].data = Object.values(genders);
  }
};
</script>