Lecture

Python Library for Visualization, Seaborn

Data visualization plays a crucial role in understanding data intuitively. Using graphs makes it easier to identify patterns in the data compared to plain numbers.

Seaborn is a Python library specialized in data visualization, built on Matplotlib, allowing for the easy creation of intuitive and sophisticated graphs.

With Seaborn, you can create various visualizations such as Bar plots, Distribution plots, and Box plots with simple code.


Installing Seaborn

Seaborn can be installed with the following command:

Installing Seaborn
pip install seaborn

In a practice environment, instead of the above command, use await piplite.install('seaborn') to install it in a way optimized for practice.


Why Seaborn is Widely Used

Seaborn provides many features that make data visualization straightforward.

  • DataFrame-based visualization: It integrates smoothly with Pandas DataFrame.

  • Elegant default styles: Generates visually appealing graphs without additional style settings.

  • Offers advanced graphs: Includes advanced visualization features like heatmap, violin plot, and pairplot.

  • Built-in statistical analysis: Use functions like kdeplot, histplot to analyze data distribution and relationships.


How to Use Seaborn

To use Seaborn, you first need to import the library.

The code below is an example of how to import Seaborn and set up basic configurations for graphing.

1. Importing the Seaborn Library

Use Python's import statement to load the Seaborn library.

Importing Seaborn Library
import seaborn as sns import matplotlib.pyplot as plt # Set style sns.set_theme()

2. Creating Basic Graphs with the Penguins Dataset

In the example below, we perform visualization using the Penguins dataset included in Seaborn.

Basic Graph Example with Seaborn
import seaborn as sns import matplotlib.pyplot as plt # Load sample data penguins = sns.load_dataset("penguins") # Bar plot of penguin species count sns.countplot(x="species", data=penguins) # Display graph plt.show()

Running the above code will generate a bar plot showing the count according to species (penguin species).


3. Visualizing the Relationship Between Two Variables

Using Seaborn's scatterplot, you can visually check the relationship between two variables.

Visualizing Relationship Between Variables
sns.scatterplot(x="bill_length_mm", y="bill_depth_mm", hue="species", data=penguins) # Display graph plt.show()

This code visualizes the relationship between bill_length_mm and bill_depth_mm in the penguins dataset, differentiating by penguin species using colors.


With Seaborn, you can effectively visualize complex data with simple code.

Developing the habit of using Seaborn to first check patterns before data analysis will make your data analysis much more intuitive and efficient.

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Easy machine learning model building

Easy deep learning model building

Specialized in data preprocessing

Data visualization

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