LineCollection and PolyCollection for speed in Matplotlib - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the correct collection class for drawing multiple lines efficiently.

Matplotlib

from matplotlib.collections import [1]

lines = LineCollection([[(0, 0), (1, 1)], [(1, 0), (0, 1)]])

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ACircleCollection

BPolyCollection

CPatchCollection

DLineCollection

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing PolyCollection instead of LineCollection.

Using PatchCollection which is for patches, not lines.

The LineCollection class is used to draw multiple lines efficiently in matplotlib.

2fill in blank

medium

Complete the code to create a PolyCollection from a list of polygons.

Matplotlib

from matplotlib.collections import PolyCollection

polygons = [[(0, 0), (1, 0), (0.5, 1)], [(1, 1), (2, 1), (1.5, 2)]]
collection = PolyCollection([1])

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Alines

Bpatches

Cpolygons

Dpoints

Attempts:

3 left

💡 Hint

Common Mistakes

Passing 'lines' or 'points' instead of 'polygons'.

Passing an undefined variable.

The PolyCollection takes a list of polygons as input, so we pass the polygons variable.

3fill in blank

hard

Fix the error in the code to add a LineCollection to the axes.

Matplotlib

import matplotlib.pyplot as plt
from matplotlib.collections import LineCollection

fig, ax = plt.subplots()
lines = [[(0, 0), (1, 1)], [(1, 0), (0, 1)]]
collection = LineCollection(lines)
ax.[1](collection)
plt.show()

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Aadd_collection

Badd_patch

Cadd_artist

Dadd_line

Attempts:

3 left

💡 Hint

Common Mistakes

Using add_line which does not exist.

Using add_patch which is for patches, not collections.

The correct method to add a LineCollection to axes is add_collection.

4fill in blank

hard

Fill both blanks to create a PolyCollection with face colors and add it to the axes.

Matplotlib

import matplotlib.pyplot as plt
from matplotlib.collections import PolyCollection

fig, ax = plt.subplots()
polygons = [[(0, 0), (1, 0), (0.5, 1)], [(1, 1), (2, 1), (1.5, 2)]]
colors = ['red', 'blue']
collection = PolyCollection([1], facecolors=[2])
ax.add_collection(collection)
plt.show()

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Apolygons

Blines

Ccolors

Dpatches

Attempts:

3 left

💡 Hint

Common Mistakes

Passing lines instead of polygons.

Passing patches instead of colors for facecolors.

The first blank should be the list of polygons, and the second blank should be the list of colors for facecolors.

5fill in blank

hard

Fill all three blanks to create a LineCollection with linewidths and add it to the axes.

Matplotlib

import matplotlib.pyplot as plt
from matplotlib.collections import LineCollection

fig, ax = plt.subplots()
lines = [[(0, 0), (1, 1)], [(1, 0), (0, 1)]]
widths = [2, 4]
collection = LineCollection([1], linewidths=[2], colors='green')
ax.[3](collection)
plt.show()

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Apolygons

Blines

Cadd_collection

Dwidths

Attempts:

3 left

💡 Hint

Common Mistakes

Using polygons instead of lines.

Using add_patch instead of add_collection.

The LineCollection is created from the list of lines, with linewidths set to widths, and added to axes using add_collection.