Bar chart example in python
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- Category: 12th class computer practical's.
- Published: Friday, 11 June 2021 07:55
- Written by Super User
- Hits: 320
import matplotlib.pyplot as plt
import numpy as np
objects = ('Python', 'C++', 'Java', 'Perl', 'Scala', 'Lisp')
y_pos = np.arange(len(objects))
performance = [10,8,6,4,2,1]
plt.bar(y_pos, performance, align='center', alpha=0.5)
plt.xticks(y_pos, objects)
plt.ylabel('Usage')
plt.title('Programming language usage')
plt.show()
Explanation: In this program we are Importing(Accessing) matplotlib and numpy libraries. these libraries help in mathematical, data analysis and graphing functions. objects is having data in list form. y_pos is having object to map y points on graph based on length of list. len returns number of items in list. performance in another list used as X points on graph
plt.bar function is passing y point positions data, performance rating list data, align attribute having value center and transparency of bar graph in alpha. an integer between 0 and 1 specifying the transparency of each bar. A lower value of alpha results in a more transparent bar chart. xtics function takes y points data and maps objects data on those positions.
ylabel function names y axis label to show. title function shows the Label for bar graph. show function shows the graph on screen
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