Introduction to relational plots and subplots

Introduction to Data Visualization with Seaborn

Erin Case

Data Scientist

Questions about quantitative variables

Relational plots

Height vs. weight

Scatter plot of height versus weight

Questions about quantitative variables

Relational plots

Height vs. weight
Number of school absences vs. final grade

Scatter plot of number of absences versus final grade

Questions about quantitative variables

Relational plots

Height vs. weight
Number of school absences vs. final grade
GDP vs. percent literate

Scatter plot of GDP versus percent literate

Scatter plot with hue

¹ Waskom, M. L. (2021). seaborn: statistical data visualization. https://seaborn.pydata.org/

Scatter plot with subplots

¹ Waskom, M. L. (2021). seaborn: statistical data visualization. https://seaborn.pydata.org/

Introducing relplot()

Create "relational plots": scatter plots or line plots

Why use relplot() instead of scatterplot()?

relplot() lets you create subplots in a single figure

scatterplot() vs. relplot()

Using scatterplot()

import seaborn as sns
import matplotlib.pyplot as plt

sns.scatterplot(x="total_bill", 
                y="tip", 
                data=tips)

plt.show()

Using relplot()

import seaborn as sns
import matplotlib.pyplot as plt

sns.relplot(x="total_bill", 
            y="tip", 
            data=tips,
            kind="scatter")

plt.show()

¹ Waskom, M. L. (2021). seaborn: statistical data visualization. https://seaborn.pydata.org/

Subplots in columns

import seaborn as sns
import matplotlib.pyplot as plt

sns.relplot(x="total_bill", 
            y="tip", 
            data=tips,
            kind="scatter",
            col="smoker")

plt.show()

Scatter plot with smoker subplots in columns

¹ Waskom, M. L. (2021). seaborn: statistical data visualization. https://seaborn.pydata.org/

Subplots in rows

import seaborn as sns
import matplotlib.pyplot as plt

sns.relplot(x="total_bill", 
            y="tip", 
            data=tips,
            kind="scatter",
            row="smoker")

plt.show()

Scatter plot with smoker subplots in rows

¹ Waskom, M. L. (2021). seaborn: statistical data visualization. https://seaborn.pydata.org/

Subplots in rows and columns

import seaborn as sns
import matplotlib.pyplot as plt

sns.relplot(x="total_bill", 
            y="tip", 
            data=tips,
            kind="scatter",
            col="smoker",
            row="time")

plt.show()

Scatter plot with subplots for smoker and time

¹ Waskom, M. L. (2021). seaborn: statistical data visualization. https://seaborn.pydata.org/

Subgroups for days of the week

Scatter plot with day subplots in columns

¹ Waskom, M. L. (2021). seaborn: statistical data visualization. https://seaborn.pydata.org/

Wrapping columns

import seaborn as sns
import matplotlib.pyplot as plt

sns.relplot(x="total_bill", 
            y="tip", 
            data=tips,
            kind="scatter",
            col="day",
            col_wrap=2)

plt.show()

Scatter plot with day subplots in columns in two rows

¹ Waskom, M. L. (2021). seaborn: statistical data visualization. https://seaborn.pydata.org/

Ordering columns

import seaborn as sns
import matplotlib.pyplot as plt

sns.relplot(x="total_bill", 
            y="tip", 
            data=tips,
            kind="scatter",
            col="day",
            col_wrap=2,
            col_order=["Thur",
                       "Fri",
                       "Sat",
                       "Sun"])

plt.show()

Scatter plot with ordered day subplots

¹ Waskom, M. L. (2021). seaborn: statistical data visualization. https://seaborn.pydata.org/

Let's practice!

Introduction to Data Visualization with Seaborn