Friday, October 3, 2025
HomeLanguagesAdd a border around histogram bars in Matplotlib

Add a border around histogram bars in Matplotlib

Prerequisites: Matplotlib

In this article, we will see how can we can add a border around histogram bars in our graph using matplotlib, Here we will take two different examples to showcase our graph.

Approach:

  • Import required module.
  • Create data.
  • Add border around histogram bars.
  • Normally plot the data.
  • Display plot.

Below is the Implementation:

Example 1:

In this example, we will Pass an edgecolor = ‘Black’ value as the edge color parameter to plt.hist() to change the bar border color.

Python3




# importing package
from matplotlib import pyplot as plt
import numpy as np
  
#create data
fig,ax = plt.subplots(1,1)
a = np.array([22, 87, 5, 43, 56, 73, 55,
              54, 11, 20, 51, 5, 79, 31, 27])
  
b = (0, 25, 50, 75, 100)
  
# Adjust the border color
ax.hist(a, b, edgecolor = "black")
  
ax.set_title("histogram - GeekforLazyroar")
ax.set_xlabel('Litracy Level(%)')
ax.set_ylabel('Population(million)')
  
plt.show()


Output:

Example 2:

In this example, we will Pass a two edge color, edgecolor = ‘Black’ and ‘red’ value as the edge color parameter to plt.hist() to change the bar border color.

Python3




# importing package
from matplotlib import pyplot as plt
import numpy as np
  
#create data
fig,ax = plt.subplots(1, 1)
  
a = np.array([20, 73, 55, 31, 51, 5, 79, 5,
              43, 22, 87, 54, 11, 56, 27])
  
b = np.array([0, 25, 50, 75, 100])
  
# Adjust the border color
ax.hist(a, edgecolor = "black", color = 'pink')
ax.hist(b, edgecolor = "red", color = 'gray')
  
ax.set_title("Histogram - GeekforLazyroar")
plt.show()


Output:

Dominic
Dominichttp://wardslaus.com
infosec,malicious & dos attacks generator, boot rom exploit philanthropist , wild hacker , game developer,
RELATED ARTICLES

Most Popular

Dominic
32331 POSTS0 COMMENTS
Milvus
85 POSTS0 COMMENTS
Nango Kala
6703 POSTS0 COMMENTS
Nicole Veronica
11867 POSTS0 COMMENTS
Nokonwaba Nkukhwana
11928 POSTS0 COMMENTS
Shaida Kate Naidoo
6818 POSTS0 COMMENTS
Ted Musemwa
7080 POSTS0 COMMENTS
Thapelo Manthata
6775 POSTS0 COMMENTS
Umr Jansen
6776 POSTS0 COMMENTS