# Zero Centered Bar

The **zero centered bar** chart is used when you want to compare data against a value that can be set as zero, and the data values you have oscillate back and forth this value.

## The Method To Use <a href="#the-method-to-use" id="the-method-to-use"></a>

The method is `s.plt.zero_centered_bar()`

It must contain the following input variables:

```python
x: str
order: int
data: Union[str, DataFrame, List[Dict]]
```

And accepts the following input variables as optional:

```python
y: Optional[List[str]]
x_axis_name: Optional[str]
y_axis_name: Optional[str]
title: Optional[str]
rows_size: Optional[int]
cols_size: Optional[int]
padding: Optional[List[int]]
show_values: Optional[List[str]]
option_modifications: Optional[Dict]
```

## Examples <a href="#examples" id="examples"></a>

### 1. Default Configuration <a href="#id-1.default-configuration" id="id-1.default-configuration"></a>

```python
data = [
    {'Name': 'a', 'y': 5},
    {'Name': 'b', 'y': -7},
    {'Name': 'c', 'y': 3},
    {'Name': 'd', 'y': -5},
]

s.plt.zero_centered_bar(
    data=data, x='Name', order=0,
)
```

![Zero centered bar chart in the default configuration.](/files/DmhxwPk7j0SdpKMxb0VW)

### &#x20;2. Customization And Context <a href="#id-2.-title-subtitle-axes-names-legend" id="id-2.-title-subtitle-axes-names-legend"></a>

It is possible to personalize the **title** of the chart, its **subtitle**, its **size** and add **padding**. One example could be obtained using:

```python
data = [
    {'Name': '0h', 'level': 2.6},
    {'Name': '3h', 'level': -3},
    {'Name': '6h', 'level': 3.2},
    {'Name': '9h', 'level': -2.9},
    {'Name': '12h', 'level': 3.6},
    {'Name': '15h', 'level': -3.4},
]

s.plt.zero_centered_bar(
    data=data, x='Name',
    order=0, rows_size=2, cols_size=7,
    padding='0,0,0,1', title='Tide level (m)',
)
```

![Note the space before the component with padding='0,0,0,1', the size with rows\_size=2, cols\_size=7,title='Tide level (m)', and subtitle='West Sector'. The menu\_path='zero-centered-bar-tide' was changed also.](/files/e9Vc0bkGEbnUbRCXi7aH)

## Variants

By setting the parameter `variant` to the following values the appearance of the chart can be changed:

{% tabs %}
{% tab title="Clean" %}

<figure><img src="/files/IK9aCYD45wW2A3kgHWyQ" alt=""><figcaption><p>variant="clean"</p></figcaption></figure>
{% endtab %}

{% tab title="Minimal" %}

<figure><img src="/files/FJjNgxRbLU2hbvf9D5df" alt=""><figcaption><p>variant="minimal"</p></figcaption></figure>
{% endtab %}

{% tab title="Thin" %}

<figure><img src="/files/ioVzBSWgRKwZ4AhzAuBU" alt=""><figcaption></figcaption></figure>
{% endtab %}

{% tab title="Clean Thin" %}

<figure><img src="/files/kCOo8Owwu1b42eIEiyqZ" alt=""><figcaption><p>variant="clean thin"</p></figcaption></figure>
{% endtab %}

{% tab title="Minimal Thin" %}

<figure><img src="/files/DnRtfA8FnHy6D8YXQqOg" alt=""><figcaption><p>variant="minimal thin"</p></figcaption></figure>
{% endtab %}

{% tab title="Shadow" %}

<figure><img src="/files/BgNt8q9HoEA6JHuNJ6uD" alt=""><figcaption><p>variant="shadow"</p></figcaption></figure>
{% endtab %}

{% tab title="Clean Shadow" %}

<figure><img src="/files/q0qZmSwKEQzFZy1M5svV" alt=""><figcaption><p>variant="clean shadow"</p></figcaption></figure>
{% endtab %}

{% tab title="Minimal Shadow" %}

<figure><img src="/files/CvTyae9SqdK8wJdjcmks" alt=""><figcaption><p>variant="minimal shadow"</p></figcaption></figure>
{% endtab %}
{% endtabs %}

{% hint style="info" %}

### Featured Content

[Changing the Menu Path](/dev/building-web-app/menu/changing-the-menu-path.md)\
The `menu_path` can be modified.<br>

[Using the Grid](/dev/building-web-app/grid/using-the-grid.md)

It is possible to use any number of rows.
{% endhint %}


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