Mplcursors for hover labels in Matplotlib - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the mplcursors library.

Matplotlib

import [1]

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

Amplcursors

Bmatplotlib

Cnumpy

Dpandas

Attempts:

3 left

💡 Hint

Common Mistakes

Importing matplotlib instead of mplcursors.

Trying to import numpy or pandas which are unrelated here.

mplcursors is the library used to add interactive hover labels in matplotlib plots.

2fill in blank

medium

Complete the code to create a scatter plot with matplotlib.

Matplotlib

fig, ax = plt.subplots()
ax.[1](x, y)

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Ascatter

Bplot

Cbar

Dhist

Attempts:

3 left

💡 Hint

Common Mistakes

Using plot() which draws lines between points.

Using bar() or hist() which are for different chart types.

Scatter plots are created with the scatter() method in matplotlib.

3fill in blank

hard

Fix the error in the code to enable hover labels using mplcursors.

Matplotlib

cursor = mplcursors.[1](ax.collections)

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Aselect

Bconnect

Chover

Dcursor

Attempts:

3 left

💡 Hint

Common Mistakes

Using hover() which does not exist in mplcursors.

Using connect() or select() which are not valid functions here.

The correct function to create interactive cursors is mplcursors.cursor().

4fill in blank

hard

Fill both blanks to add a custom label format for the hover labels.

Matplotlib

cursor.connect("add", lambda sel: sel.annotation.set_text(f"X: {sel.target[[1]]:.2f}\nY: {sel.target[[2]]:.2f}"))

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A0

B1

C2

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Using indices 1 and 2 which are out of range for 2D points.

Using 2 or 3 which do not exist in the coordinate tuple.

The x and y coordinates are at index 0 and 1 in sel.target respectively.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps points to their labels with conditions.

Matplotlib

labels = { [1]: f"Point {x}" for x in points if x[[2]] [3] 0 }

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Ax

B1

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using index 0 instead of 1 for y coordinate.

Using '<' instead of '>' for the condition.

Using something other than the point as the key.

The dictionary keys are points (x), filtering points where y (index 1) is greater than 0.