Ranking charts in Matplotlib - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a simple bar chart showing rankings.

Matplotlib

import matplotlib.pyplot as plt

items = ['A', 'B', 'C', 'D']
scores = [4, 2, 3, 1]

plt.bar(items, [1])
plt.show()

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

Arange(4)

Bitems

C[1, 2, 3, 4]

Dscores

Attempts:

3 left

💡 Hint

Common Mistakes

Using the item names instead of scores for bar heights.

Passing a range object instead of a list of scores.

The bar chart needs the heights of bars, which are the scores.

2fill in blank

medium

Complete the code to sort the items by their scores before plotting.

Matplotlib

items = ['A', 'B', 'C', 'D']
scores = [4, 2, 3, 1]

sorted_pairs = sorted(zip(items, scores), key=lambda x: x[[1]])
sorted_items, sorted_scores = zip(*sorted_pairs)

import matplotlib.pyplot as plt
plt.bar(sorted_items, sorted_scores)
plt.show()

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

A0

B1

C-1

D2

Attempts:

3 left

💡 Hint

Common Mistakes

Sorting by index 0 which is the item name, not the score.

Using an invalid index like 2 which does not exist.

The scores are the second element in each pair, index 1.

3fill in blank

hard

Fix the error in the code to display the ranking chart with labels rotated.

Matplotlib

import matplotlib.pyplot as plt

items = ['A', 'B', 'C', 'D']
scores = [4, 2, 3, 1]

plt.bar(items, scores)
plt.xticks(rotation=[1])
plt.show()

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

A45

Brotation=45

C'45deg'

D'45 degrees'

Attempts:

3 left

💡 Hint

Common Mistakes

Passing rotation as a string causes an error.

Using an invalid keyword inside plt.xticks.

The rotation argument expects an integer number of degrees, not a string.

4fill in blank

hard

Fill both blanks to create a horizontal bar chart sorted by scores.

Matplotlib

import matplotlib.pyplot as plt

items = ['A', 'B', 'C', 'D']
scores = [4, 2, 3, 1]

sorted_pairs = sorted(zip(items, scores), key=lambda x: x[[1]])
sorted_items, sorted_scores = zip(*sorted_pairs)

plt.[2](sorted_items, sorted_scores)
plt.show()

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

A1

B0

Cbarh

Dbar

Attempts:

3 left

💡 Hint

Common Mistakes

Sorting by index 0 which is item name.

Using plt.bar instead of plt.barh for horizontal bars.

Sort by scores at index 1 and use plt.barh for horizontal bars.

5fill in blank

hard

Fill all three blanks to create a ranking chart with colors based on score thresholds.

Matplotlib

import matplotlib.pyplot as plt

items = ['A', 'B', 'C', 'D']
scores = [4, 2, 3, 1]

colors = ['green' if score [1] 3 else 'red' for score in scores]

plt.bar(items, scores, color=[2])
plt.title('Ranking Chart')
plt.ylabel([3])
plt.show()

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

A>

Bcolors

C'Scores'

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' changes color logic.

Passing a string instead of the colors list to color.

Not labeling the y-axis properly.

Use '>' to check scores above 3, pass colors list, and label y-axis as 'Scores'.