Data Visualization — Line Plot

Benjamin Obi Tayo Ph.D.
3 min readApr 9, 2023

Learn the basics of data visualization using line plots

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About the Author

Benjamin O. Tayo is a data science educator, tutor, coach, mentor, and consultant. Contact me for more information about our services and pricing: benjaminobi@gmail.com

Dr. Tayo has written close to 300 articles and tutorials in data science for educating the general public. Support Dr. Tayo’s educational mission using the links below:

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INTRODUCTION

After reading this article, the reader will learn the following:

  • Define a line plot
  • Generate a line plot using python
  • Fit a simple linear regression model and visualize the result using a line plot

Learn about data visualization using scatter plots by clicking on the link below:

A line plot is used in data science to quantify the functional relationship between the independent variable x and the dependent variable y. Using simple linear regression, the relation between x and y can be expressed as y = a + b x, where a and b are the regression coefficients to be determined.

Python Implementation of a Line Plot

As an illustration, we will fit a simple linear regression model and then visualize the result using a line graph.

Example 1: Tesla stock price vs. Apple stock price

# import necessary libraries
import numpy as np

import pandas as pd

import matplotlib.pyplot as plt

import seaborn as sns

# obtain dataset

data = pd.read_csv('https://raw.githubusercontent.com/bot13956/datasets/master/tech-stocks-04-2021.csv')

# Example 1: Tesla stock price vs Apply stock price

# define x and y

x = data.AAPL.values[0:11]

y = data.TSLA.values[0:11]

# fit simple linear…

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Benjamin Obi Tayo Ph.D.

Dr. Tayo is a data science educator, tutor, coach, mentor, and consultant. Contact me for more information about our services and pricing: benjaminobi@gmail.com