Why line plots show trends in Matplotlib - See It in Action

Why Line Plots Show Trends

📖 Scenario: Imagine you are a weather observer who wants to understand how temperature changes over a week. You have recorded the temperature each day and want to see if it is getting warmer or colder.

🎯 Goal: You will create a simple line plot using matplotlib to visualize temperature changes over days. This will help you see the trend of temperature rising or falling.

📋 What You'll Learn

Create a list called days with values from 1 to 7 representing days of the week

Create a list called temperatures with exact values: 22, 21, 23, 24, 26, 27, 28

Use matplotlib.pyplot to plot days on the x-axis and temperatures on the y-axis

Add labels for x-axis as 'Day' and y-axis as 'Temperature (°C)'

Add a title 'Temperature Trend Over a Week'

Display the plot

💡 Why This Matters

🌍 Real World

Line plots are used in weather forecasting, stock market analysis, and health monitoring to see how values change over time.

💼 Career

Data scientists and analysts use line plots to quickly understand trends and patterns in data, which helps in making decisions.

1

Create the data lists

Create a list called days with values [1, 2, 3, 4, 5, 6, 7] and a list called temperatures with values [22, 21, 23, 24, 26, 27, 28].

Matplotlib

# Create the lists for days and temperatures
# Your code here

Need a hint?

Use square brackets to create lists. Put the exact numbers inside the lists separated by commas.

2

Import matplotlib and prepare to plot

Import matplotlib.pyplot as plt to prepare for plotting the data.

Matplotlib

days = [1, 2, 3, 4, 5, 6, 7]
temperatures = [22, 21, 23, 24, 26, 27, 28]

# Import matplotlib.pyplot as plt
# Your code here

Need a hint?

Use import matplotlib.pyplot as plt to import the plotting library.

3

Plot the line graph with labels and title

Use plt.plot(days, temperatures) to create the line plot. Then add x-axis label 'Day', y-axis label 'Temperature (°C)', and title 'Temperature Trend Over a Week'.

Matplotlib

import matplotlib.pyplot as plt

days = [1, 2, 3, 4, 5, 6, 7]
temperatures = [22, 21, 23, 24, 26, 27, 28]

# Plot the line graph
# Add labels and title
# Your code here

Need a hint?

Use plt.plot() to draw the line. Use plt.xlabel(), plt.ylabel(), and plt.title() to add text.

4

Display the plot

Use plt.show() to display the line plot showing the temperature trend.

Matplotlib

import matplotlib.pyplot as plt

days = [1, 2, 3, 4, 5, 6, 7]
temperatures = [22, 21, 23, 24, 26, 27, 28]

plt.plot(days, temperatures)
plt.xlabel('Day')
plt.ylabel('Temperature (°C)')
plt.title('Temperature Trend Over a Week')

# Show the plot
# Your code here

Need a hint?

Use plt.show() to display the graph window.