# ee.Array.erf

On an element-wise basis, computes the error function of the input.

<br />

| Usage | Returns |
|---|---|
| `Array.erf()` | Array |

| Argument | Type | Details |
|---|---|---|
| this: `input` | Array | The input array. |

## Examples

### Code Editor (JavaScript)

```javascript
print(ee.Array([-6]).erf());  // [-1]
print(ee.Array([0]).erf());  // [0]
print(ee.Array([6]).erf());  // [1]

var start = -3;
var end = 3;
var points = ee.Array(ee.List.sequence(start, end, null, 50));
var values = points.erf();

// Plot erf() defined above.
var chart = ui.Chart.array.values(values, 0, points)
    .setOptions({
      viewWindow: {min: start, max: end},
      hAxis: {
        title: 'x',
        viewWindowMode: 'maximized',
        ticks: [
          {v: start},
          {v: 0},
          {v: end}]
      },
      vAxis: {
        title: 'erf(x)',
        ticks: [
          {v: -1},
          {v: 0},
          {v: 1}]
      },
      lineWidth: 1,
      pointSize: 0,
    });
print(chart);
```
Python setup

See the [Python Environment](https://developers.google.com/earth-engine/guides/python_install) page for information on the Python API and using
`geemap` for interactive development.

```python
import ee
import geemap.core as geemap
```

### Colab (Python)

```python
import altair as alt
import pandas as pd

display(ee.Array([-6]).erf())  # [-1]
display(ee.Array([0]).erf())  # [0]
display(ee.Array([6]).erf())  # [1]

start = -3
end = 3
points = ee.Array(ee.List.sequence(start, end, None, 50))
values = points.erf()

df = pd.DataFrame({'x': points.getInfo(), 'erf(x)': values.getInfo()})

# Plot erf() defined above.
alt.Chart(df).mark_line().encode(
    x=alt.X('x', axis=alt.Axis(values=[start, 0, end])),
    y=alt.Y('erf(x)', axis=alt.Axis(values=[-1, 0, 1]))
)
```