Dumbbell charts in Matplotlib - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the matplotlib plotting library.

Matplotlib

import [1] as plt

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

Aseaborn

Bmatplotlib.pyplot

Cpandas

Dnumpy

Attempts:

3 left

💡 Hint

Common Mistakes

Importing the wrong library like numpy or pandas instead of matplotlib.pyplot.

Forgetting to use 'as plt' for shorthand.

We import matplotlib.pyplot as plt to create plots.

2fill in blank

medium

Complete the code to create a figure and axis for plotting.

Matplotlib

fig, ax = plt.[1]()

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

Asubplots

Bfigure

Cplot

Dshow

Attempts:

3 left

💡 Hint

Common Mistakes

Using plt.plot() which only plots data but does not create axes.

Using plt.figure() which creates a figure but not axes.

The subplots() function creates a figure and axes for plotting.

3fill in blank

hard

Fix the error in the code to plot two points connected by a line for a dumbbell chart.

Matplotlib

ax.plot([1, 2], [[1], 5], marker='o', color='blue')

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

A7

B5

C1

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same y-value twice, which plots a horizontal line.

Using a single number instead of a list of two numbers.

The y-values must be two numbers to plot points connected by a line. Using 3 and 5 creates a line between points at y=3 and y=5.

4fill in blank

hard

Fill both blanks to create a dumbbell chart connecting two sets of values for categories.

Matplotlib

ax.hlines(y=[1], xmin=[2], xmax=[1], color='gray', linewidth=2)

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

A[1, 2, 3, 4]

B[5, 6, 7, 8]

C[0, 1, 2, 3]

D[4, 5, 6, 7]

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same list for y and xmin, which results in zero-length lines.

Swapping xmin and xmax values.

The horizontal lines are drawn at y positions from the categories list (e.g., [1, 2, 3, 4]). The xmin values are the smaller values (e.g., [0, 1, 2, 3]) to connect to xmax.

5fill in blank

hard

Fill all three blanks to complete the dumbbell chart code with points and lines.

Matplotlib

ax.scatter([1], [2], color='red', label='Start')
ax.scatter([3], [2], color='blue', label='End')
ax.hlines(y=[2], xmin=[1], xmax=[3], color='gray')

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

A[1, 2, 3, 4]

B[5, 6, 7, 8]

D[0, 1, 2, 3]

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up xmin and xmax values.

Using different y values for scatter and lines.

The y positions are the category indices [1, 2, 3, 4]. The start points are at xmin values [0, 1, 2, 3], and the end points are at xmax values [5, 6, 7, 8].