---
title: "基础平滑图"
language: "zh"
canonical: "https://g2.antv.antgroup.com/zh/examples/general/ema/ema-basic/"
version: "5.4.8"
---

# 基础平滑图

[运行示例](https://g2.antv.antgroup.com/zh/examples/general/ema/ema-basic/)

[资料索引](/llms.txt)

页面需要一个 `id="container"` 的 DOM 元素。以下为原始示例源码。

## 源码

```ts
import { Chart } from '@antv/g2';

const chart = new Chart({
  container: 'container',
  autoFit: true,
  height: 300,
});

const data = [
  { x: 0, y: 30 },
  { x: 1, y: 80 },
  { x: 2, y: 45 },
  { x: 3, y: 90 },
  { x: 4, y: 20 },
  { x: 5, y: 60 },
  { x: 6, y: 30 },
  { x: 7, y: 85 },
  { x: 8, y: 40 },
  { x: 9, y: 70 },
];

chart.options({
  type: 'view',
  children: [
    {
      type: 'line',
      data: {
        type: 'inline',
        value: data,
        transform: [
          {
            type: 'ema',
            field: 'y',
            alpha: 0.6,
            as: 'emaY',
          },
        ],
      },
      encode: {
        x: 'x',
        y: 'emaY',
      },
      style: {
        stroke: '#f90',
        lineWidth: 2,
      },
    },
    {
      type: 'line',
      data: {
        type: 'inline',
        value: data,
      },
      encode: {
        x: 'x',
        y: 'y',
      },
      style: {
        stroke: '#ccc',
        lineDash: [4, 2],
      },
    },
  ],
});

chart.render();
```