# Plotnine: ggplot in python

`Plotnine`

is a library that allows to use the **grammar of graphics** in `Python`

. It is based on the famous `ggplot2`

library in R.

Plotnine is a great tool to create **beautiful** and **complex** visualizations with a syntax that R users already know and love.

## ⏱ Quick start

Before using plotnine you need to install it. This can easily be done with `pip`

:

`pip install plotnine`

The **Grammar of Graphics** is a way of thinking about how to build graphs. It is based on the idea that you can build a graph by **adding layers** to it. In this example, we add a layer of points to a graph.

Once installed, you can either **import all the functions** from the library with `from plotnine import *`

or import only the functions you need with `from plotnine import ggplot, geom_point`

.

```
# Load plotnine
from plotnine import ggplot, geom_point, aes
import pandas as pd
# Sample data
x = [1,2,3,4,5,6,7,8,9,10]
y = [10,9,8,7,6,5,4,3,2,1]
df = pd.DataFrame({'x':x, 'y':y})
# Create a chart
(
ggplot(df, aes(x='x', y='y')) +
geom_point()
)
```

## Scatter plot with plotnine

Scatter plots are a great way to visualize the relationship between two numerical variables. The `plotnine`

library makes it easy to thanks to its `geom_point()`

function.

## Bar plot with plotnine

Bar plots are a great way to visualize the relationship between a categorical variable and a numerical one. The `plotnine`

library makes it easy thanks to its `geom_bar()`

function.

The following examples show how to **create a basic bar plot** with plotnine and how to **customize it**.

## Histogram with plotnine

Bar plots are a great way to visualize the distribution of a numerical variable. The `plotnine`

library makes it easy thanks to its `geom_histogram()`

function.

The following examples show how to **create a basic histogram** with plotnine and how to **customize it**.

## Change theme with plotnine

`Plotnine`

allows to **change the theme** of the chart. This can easily be done by adding `theme_*`

functions to the chart.