How to Change Fonts in matplotlib?

Prerequisites: Matplotlib 

In this article, we will see how can we can change the font family of our graph using matplotlib. A variety of fonts are in fact supported by matplotlib, alone has to do in order to implement is pass the name as value to fontname parameter.

Approach:

• Import required library.
• Create data
• Set changed font 
• Normally plot the data
• Display plot

Example 1: Change the font just for the axis labels.

Python3

from scipy import signal
import matplotlib.pyplot as plot
import numpy as np
# %matplotlib inline

# Plot the square wave
t = np.linspace(0, 1, 1000, endpoint=True)
plot.plot(t, signal.square(2 * np.pi * 5 * t))

# Change the x, y axis label to "Brush Script MT" font style.
plot.xlabel("Time (Seconds)", fontname="Brush Script MT", fontsize=18)
plot.ylabel("Amplitude", fontname="Brush Script MT", fontsize=18)

plot.show()

Output:

Example 2: Change the font just for the title.

Python3

import matplotlib.pyplot as plot

x = [1, 2, 3, 4, 5, 6]
y = [0, 2, 4, 6, 8, 10]

# plotting a plot
plot.scatter(x, y)

# Set the title to 'Franklin Gothic Medium' style.
plot.title("Line Graph - Geeksforgeeks",
           fontname='Franklin Gothic Medium', fontsize=18)

plot.show()

Output:

Example 3: Change the font just for the title and axis labels.

Python3

import matplotlib.pyplot as plot

x = [1, 2, 3, 4, 5, 6]
y = [0, 2, 4, 6, 8, 10]

# plotting a plot
plot.plot(x, y)


# Change the x, y axis label to 'Gabriola' style.
plot.xlabel("Years", fontname="Gabriola", fontsize=18)
plot.ylabel("Population (million)", fontname="Gabriola", fontsize=18)

# Set the title to 'Franklin Gothic Medium' style.
plot.title("Line Graph - Geeksforgeeks",
           fontname='Franklin Gothic Medium', fontsize=18)

plot.show()

Output: