Convex hull computation in SciPy - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the convex hull function from scipy.spatial.

SciPy

from scipy.spatial import [1]

points = [[0, 0], [1, 1], [1, 0], [0, 1]]
hull = ConvexHull(points)

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

Ahull

Bconvex_hull

CConvex_Hull

DConvexHull

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase or incorrect casing for ConvexHull

Trying to import a non-existent function like convex_hull

The correct function to import is ConvexHull with exact casing from scipy.spatial.

2fill in blank

medium

Complete the code to create a convex hull object from the points array.

SciPy

import numpy as np
from scipy.spatial import ConvexHull

points = np.array([[0, 0], [1, 1], [1, 0], [0, 1]])
hull = [1](points)

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

AHull

Bconvex_hull

CConvexHull

DconvexHull

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect casing or misspelled class names

Trying to call a function that does not exist

The convex hull object is created by calling ConvexHull(points).

3fill in blank

hard

Fix the error in accessing the convex hull vertices.

SciPy

import numpy as np
from scipy.spatial import ConvexHull

points = np.array([[0, 0], [1, 1], [1, 0], [0, 1]])
hull = ConvexHull(points)
vertices = hull.[1]

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

Apoints

Bvertices

Cvertex

Dverts

Attempts:

3 left

💡 Hint

Common Mistakes

Using singular 'vertex' instead of 'vertices'

Trying to access non-existent attributes like 'verts'

The convex hull vertices are accessed using hull.vertices.

4fill in blank

hard

Fill both blanks to create a dictionary of hull vertices and their coordinates.

SciPy

vertex_coords = {hull.[1][i]: points[hull.[2][i]] for i in range(len(hull.vertices))}

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

Avertices

Bpoints

Cvertex

Dverts

Attempts:

3 left

💡 Hint

Common Mistakes

Using different or incorrect attribute names for the two blanks

Using singular 'vertex' instead of 'vertices'

Both blanks should be vertices to access the indices of hull vertices.

5fill in blank

hard

Fill all three blanks to compute the perimeter of the convex hull polygon.

SciPy

import numpy as np
perimeter = 0
for i in range(len(hull.[1])):
    start = points[hull.[2][i]]
    end = points[hull.[3][(i + 1) % len(hull.vertices)]]
    perimeter += np.linalg.norm(end - start)

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

Avertices

Dpoints

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'points' instead of 'vertices' in the blanks

Not using modulo to wrap around the last vertex

All blanks should be vertices to iterate over the hull vertex indices and compute distances between consecutive points.