You can use the following basic syntax to add a title to a subplot in Matplotlib:
ax[0, 1].set_title('Subplot Title')
The following examples shows how to use this syntax in practice.
Example 1: Add Titles to Subplots in Matplotlib
The following code shows how to create a grid of 2×2 subplots and specify the title of each subplot:
import matplotlib.pyplot as plt #define subplots fig, ax = plt.subplots(2, 2) #define subplot titles ax[0, 1].set_title('First Subplot') ax[0, 1].set_title('Second Subplot') ax[1, 0].set_title('Third Subplot') ax[1, 1].set_title('Fourth Subplot')
Notice that each subplot has a unique title.
Example 2: Add Customized Titles to Subplots in Matplotlib
We can use the following arguments to customize the titles of the subplots:
- fontsize: The font size of the title
- loc: The location of the title (“left”, “center”, “right”)
- x, y: The (x, y) coordinates of the title
- color: The font color of the title
- fontweight: The font weight of the title
The following code shows how to use these arguments in practice:
import matplotlib.pyplot as plt
#define subplots
fig, ax = plt.subplots(2, 2)
#define subplot titles
ax[0, 0].set_title('First Subplot', fontsize=18, loc='left')
ax[0, 1].set_title('Second Subplot', x=.75, y=.9)
ax[1, 0].set_title('Third Subplot', color='red')
ax[1, 1].set_title('Fourth Subplot', fontweight='bold')
Using these various arguments, you can customize the subplot titles to look however you’d like.
Additional Resources
The following tutorials explain how to perform other common operations in Matplotlib:
How to Adjust Subplot Size in Matplotlib
How to Adjust Spacing Between Matplotlib Subplots
How to Adjust Title Position in Matplotlib