Plot data from JSON file using matplotlib in Python

Welcome to the tutorial on plotting data from JSON file using matplotlib in Python.

Firstly, you should know how to create a JSON file.

Creating a JSON file

Name the file as ___.json, in our case we have named the file 01.json.

Write the following code in that file.

INPUT:

{"jan":1,"feb":2,"mar":3,"apr":7,"may":8,"jun":5,"jul":7,"aug":5,"sep":3,"oct":1,"nov":2,"dec":1}

Now, we will plot this data using matplotlib in python.

Plotting data using matplotlib

INPUT:

We have loaded the data using json.load(open(‘file-name’, ‘r’)) in the readable format.

#1
import json
import matplotlib.pyplot as plt
#2
data_1=json.load(open('01.json','r'))
#3
axis_x=[i for i in data_1]
axis_y=[data_1[i] for i in data_1]

In this, axis_x is a list containing all month names and axis_y is a list containing no. of monthly entries.

Here, we have set :

1. keys from the dictionary data loaded from JSON file i.e month names as x-axis and
2. values i.e entries during a month as y-axis.

OUTPUT:

Further, include the following in the previous code:

INPUT:

#4
plt.bar(axis_x,axis_y)
plt.xlabel("Month")
plt.ylabel("Entries")
plt.title("Monthly Entries")
plt.show()

Here, we have plotted a bar graph showing entries in a month.

OUTPUT: