Introduction - Matplotlib #1.1

In this article, we will be exploring how to plot a very simple line graph using a Python library called matplotlib.

Matplotlib is a library for making 2D and 3D graphs in Python. It has been present since around 2008. Install it through pip. Go to the command line and run the following line:

pip install matplotlib

Let’s see the example.

# First import the pyplot class. It is pretty much the 
# only thing we need right now. 
import matplotlib.pyplot as plt 

# The x-ordinates and their respective y-coordinate 
x = [1,2,3] 
y = [1,8,4] 

# Plot them 
plt.plot(x,y) 

# Just naming the axes 
plt.xlabel('X-axis') 
plt.ylabel('Y-axis') 

# Giving a title to the graph 
plt.title("Example 1") 

# Now display it 
plt.show()

I hope it is now clear how to draw a single using 2 arrays. It is fairly intuitive.

  1. Use pyplot
  2. Specify x and y values in two arrays
  3. Set up your graph i.e its title and the axes name.
  4. Plot it and display it