Title and axis labels in Matplotlib - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add a title to the plot.

Matplotlib

import matplotlib.pyplot as plt
plt.plot([1, 2, 3], [4, 5, 6])
plt.[1]("My Plot")
plt.show()

Drag options to blanks, or click blank then click option'

Atitle

Bxlabel

Cylabel

Dlegend

Attempts:

3 left

💡 Hint

Common Mistakes

Using xlabel or ylabel instead of title.

Forgetting to call plt.show() to display the plot.

The title function adds a title to the plot.

2fill in blank

medium

Complete the code to label the x-axis as 'Time'.

Matplotlib

import matplotlib.pyplot as plt
plt.plot([1, 2, 3], [4, 5, 6])
plt.[1]("Time")
plt.show()

Drag options to blanks, or click blank then click option'

Alegend

Bxlabel

Cylabel

Dtitle

Attempts:

3 left

💡 Hint

Common Mistakes

Using ylabel or title instead of xlabel.

Not calling plt.show() to display the plot.

The xlabel function sets the label for the x-axis.

3fill in blank

hard

Fix the error in the code to label the y-axis as 'Speed'.

Matplotlib

import matplotlib.pyplot as plt
plt.plot([1, 2, 3], [4, 5, 6])
plt.[1]('Speed')
plt.show()

Drag options to blanks, or click blank then click option'

Axlabel

Btitle

Cylabel

Dlegend

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'legends' instead of 'legend'.

Using xlabel or title instead of ylabel.

The correct function to label the y-axis is ylabel.

4fill in blank

hard

Fill both blanks to add a title and label the x-axis.

Matplotlib

import matplotlib.pyplot as plt
plt.plot([1, 2, 3], [4, 5, 6])
plt.[1]("Sales Over Time")
plt.[2]("Year")
plt.show()

Drag options to blanks, or click blank then click option'

Atitle

Bxlabel

Cylabel

Dlegend

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping xlabel and ylabel.

Using legend instead of xlabel.

Use title to add the plot title and xlabel to label the x-axis.

5fill in blank

hard

Fill all three blanks to add a title, label the x-axis, and label the y-axis.

Matplotlib

import matplotlib.pyplot as plt
plt.plot([1, 2, 3], [4, 5, 6])
plt.[1]("Temperature Change")
plt.[2]("Day")
plt.[3]("Degrees Celsius")
plt.show()

Drag options to blanks, or click blank then click option'

Axlabel

Bylabel

Ctitle

Dlegend

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up xlabel and ylabel.

Using legend instead of axis labels.

Use title for the plot title, xlabel for the x-axis label, and ylabel for the y-axis label.

Practice

1. Which matplotlib function is used to add a title to a plot?

easy

A. plt.axis()

B. plt.label()

C. plt.legend()

D. plt.title()

Solution

1. Step 1: Understand the purpose of plt.title()

   This function adds a title text at the top of the plot, describing what the plot shows.

2. Step 2: Compare with other functions

   plt.label() does not exist, plt.legend() adds a legend, and plt.axis() controls axis limits, so they don't add a title.

3. Final Answer:

   plt.title() -> Option D

4. Quick Check:

   Title function = plt.title() [OK]

Hint: Title is always set with plt.title() [OK]

Common Mistakes:

• Using plt.label() instead of plt.title()
• Confusing legend with title
• Trying plt.axis() for title

2. Which of the following is the correct syntax to label the x-axis as 'Time (seconds)' in matplotlib?

easy

A. plt.xlabel('Time (seconds)')

B. plt.xaxis('Time (seconds)')

C. plt.label('x', 'Time (seconds)')

D. plt.axislabel('Time (seconds)')

Solution

1. Step 1: Recall the function to label x-axis

   The correct function is plt.xlabel() which takes the label text as argument.

2. Step 2: Check other options for syntax errors

   plt.xaxis(), plt.label(), and plt.axislabel() are not valid matplotlib functions for axis labeling.

3. Final Answer:

   plt.xlabel('Time (seconds)') -> Option A

4. Quick Check:

   X-axis label = plt.xlabel() [OK]

Hint: Use plt.xlabel() for x-axis label text [OK]

Common Mistakes:

• Using plt.xaxis() which doesn't exist
• Trying plt.label() for axis
• Confusing axis limits with labels

3. What will be the output of the following code?

import matplotlib.pyplot as plt
plt.plot([1, 2, 3], [4, 5, 6])
plt.title('Sales Over Time')
plt.xlabel('Month')
plt.ylabel('Sales')
plt.show()

medium

A. A plot with title but no axis labels

B. A plot with no title and no axis labels

C. A plot with title 'Sales Over Time', x-axis labeled 'Month', y-axis labeled 'Sales'

D. A plot with axis labels but no title

Solution

1. Step 1: Analyze the code lines for title and labels

   The code uses plt.title('Sales Over Time') to add a title, plt.xlabel('Month') for x-axis label, and plt.ylabel('Sales') for y-axis label.

2. Step 2: Understand the plot display

   The plot will show the line graph with all these labels visible as specified.

3. Final Answer:

   A plot with title 'Sales Over Time', x-axis labeled 'Month', y-axis labeled 'Sales' -> Option C

4. Quick Check:

   Title and axis labels set correctly [OK]

Hint: Check all label functions called before plt.show() [OK]

Common Mistakes:

• Forgetting plt.title() call
• Mixing up xlabel and ylabel
• Not calling plt.show() to display

4. Identify the error in this code snippet that tries to add a title and axis labels:

import matplotlib.pyplot as plt
plt.plot([1, 2, 3], [3, 2, 1])
plt.title = 'My Plot'
plt.xlabel('X Axis')
plt.ylabel('Y Axis')
plt.show()

medium

A. Using assignment operator '=' instead of function call for plt.title

B. Missing plt.show() call

C. Incorrect order of xlabel and ylabel calls

D. plt.plot() arguments are invalid

Solution

1. Step 1: Check how title is set

   The code uses plt.title = 'My Plot' which assigns a string to the function name, overwriting it instead of calling it.

2. Step 2: Understand correct usage

   The correct way is to call the function: plt.title('My Plot') to set the title.

3. Final Answer:

   Using assignment operator '=' instead of function call for plt.title -> Option A

4. Quick Check:

   Title must be set by calling plt.title() [OK]

Hint: Use parentheses () to call plt.title() function [OK]

Common Mistakes:

• Assigning string to plt.title instead of calling
• Forgetting plt.show()
• Swapping xlabel and ylabel calls

5. You want to create a plot with the title 'Temperature Trends', x-axis labeled 'Day', and y-axis labeled 'Temperature (°C)'. Which code snippet correctly achieves this?

hard

A. plt.plot(days, temps)
plt.title = 'Temperature Trends'
plt.xlabel = 'Day'
plt.ylabel = 'Temperature (°C)'
plt.show()

B. plt.plot(days, temps)
plt.title('Temperature Trends')
plt.xlabel('Day')
plt.ylabel('Temperature (°C)')
plt.show()

C. plt.plot(days, temps)
plt.set_title('Temperature Trends')
plt.set_xlabel('Day')
plt.set_ylabel('Temperature (°C)')
plt.show()

D. plt.plot(days, temps)
plt.title('Temperature Trends')
plt.xaxis('Day')
plt.yaxis('Temperature (°C)')
plt.show()

Solution

1. Step 1: Verify correct function calls for title and labels

   plt.plot(days, temps) plt.title('Temperature Trends') plt.xlabel('Day') plt.ylabel('Temperature (°C)') plt.show() uses plt.title(), plt.xlabel(), and plt.ylabel() correctly with parentheses and proper arguments.

2. Step 2: Check other options for errors

   plt.plot(days, temps) plt.title = 'Temperature Trends' plt.xlabel = 'Day' plt.ylabel = 'Temperature (°C)' plt.show() incorrectly assigns strings to functions, plt.plot(days, temps) plt.set_title('Temperature Trends') plt.set_xlabel('Day') plt.set_ylabel('Temperature (°C)') plt.show() uses non-existent set_title functions, and plt.plot(days, temps) plt.title('Temperature Trends') plt.xaxis('Day') plt.yaxis('Temperature (°C)') plt.show() uses invalid xaxis and yaxis functions.

3. Final Answer:

   plt.plot(days, temps) plt.title('Temperature Trends') plt.xlabel('Day') plt.ylabel('Temperature (°C)') plt.show() -> Option B

4. Quick Check:

   Use plt.title(), plt.xlabel(), plt.ylabel() with parentheses [OK]

Hint: Always call plt.title(), plt.xlabel(), plt.ylabel() as functions [OK]

Common Mistakes:

• Assigning labels instead of calling functions
• Using non-existent set_title() methods
• Using plt.xaxis() instead of plt.xlabel()