# ee.Array.tanh

On an element-wise basis, computes the hyperbolic tangent of the input.

<br />

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

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

## Examples

### Code Editor (JavaScript)

```javascript
print(ee.Array([-5]).tanh());  // [~ -1]
print(ee.Array([0]).tanh());  // [0]
print(ee.Array([5]).tanh());  // [~ 1]

var start = -5;
var end = 5;
var points = ee.Array(ee.List.sequence(start, end, null, 50));
var values = points.tanh();

// Plot tanh() 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}]
      },
      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([-5]).tanh())  # [~ -1]
display(ee.Array([0]).tanh())  # [0]
display(ee.Array([5]).tanh())  # [~ 1]

start = -5
end = 5
points = ee.Array(ee.List.sequence(start, end, None, 50))
values = points.tanh()

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

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