# Line Interpolation / Smoothing (Chartist example)

> Two series with large jumps, drawn with simple smoothing instead of a cardinal spline.

`src/main.ts`:

```ts
import 'chartist/styles.css';
import { lineChart, Interpolation } from 'chartist';

lineChart(
  '#chart',
  {
    labels: [1, 2, 3, 4, 5],
    series: [
      [1, 5, 10, 0, 1],
      [10, 15, 0, 1, 2]
    ]
  },
  {
    // Remove this configuration to see that chart rendered with cardinal spline interpolation
    // Sometimes, on large jumps in data values, it's better to use simple smoothing.
    lineSmooth: Interpolation.simple({
      divisor: 2
    }),
    fullWidth: true,
    chartPadding: {
      right: 20
    },
    low: 0
  }
);
```

`index.html`:

```html
<!doctype html>
<html>
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <script type="module" src="/src/main.ts"></script>
  </head>
  <body>
    <div id="chart" style="height: 50vh"></div>
  </body>
</html>
```

The same chart with the 1.x classes (`src/main.classic.ts`):

```ts
import 'chartist/styles.css';
import { LineChart, Interpolation } from 'chartist';

new LineChart(
  '#chart',
  {
    labels: [1, 2, 3, 4, 5],
    series: [
      [1, 5, 10, 0, 1],
      [10, 15, 0, 1, 2]
    ]
  },
  {
    // Remove this configuration to see that chart rendered with cardinal spline interpolation
    // Sometimes, on large jumps in data values, it's better to use simple smoothing.
    lineSmooth: Interpolation.simple({
      divisor: 2
    }),
    fullWidth: true,
    chartPadding: {
      right: 20
    },
    low: 0
  }
);
```