Matrix determinant (det) in SciPy - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the function that calculates the determinant of a matrix.

SciPy

from scipy.linalg import [1]

matrix = [[1, 2], [3, 4]]
result = det(matrix)
print(result)

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

Adet

Bdeterminant

Cdetermin

Ddeterminant_calc

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong function name like 'determinant' which does not exist in scipy.linalg.

Trying to import from numpy.linalg instead of scipy.linalg.

The function to calculate the determinant in scipy.linalg is det.

2fill in blank

medium

Complete the code to calculate the determinant of the given matrix.

SciPy

from scipy.linalg import det

matrix = [[2, 3], [1, 4]]
determinant = [1](matrix)
print(determinant)

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Adet_calc

Bdet

Cdetermin

Ddeterminant

Attempts:

3 left

💡 Hint

Common Mistakes

Calling a function that is not imported or does not exist.

Trying to call 'determinant' which is not defined.

The function to calculate the determinant is det. Use it by passing the matrix.

3fill in blank

hard

Fix the error in the code to correctly compute the determinant of the matrix.

SciPy

from scipy.linalg import det

matrix = [[1, 2, 3], [4, 5, 6]]
det_value = [1](matrix)
print(det_value)

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Adetermin

Bdeterminant

Cdet_calc

Ddet

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong function name.

Trying to calculate determinant of a non-square matrix (which causes runtime error).

The matrix must be square to compute determinant. The function is det. However, the matrix here is not square, so the code will error at runtime. But the question asks to fix the function call, so det is correct.

4fill in blank

hard

Fill both blanks to create a dictionary of determinants for matrices with size 2 and 3.

SciPy

from scipy.linalg import det

matrices = {
    2: [[1, 2], [3, 4]],
    3: [[1, 0, 2], [0, 1, 5], [3, 2, 1]]
}
determinants = {size: det([1]) for size, [2] in matrices.items()}
print(determinants)

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Amatrix

Bmat

Cmatrixes

Dm

Attempts:

3 left

💡 Hint

Common Mistakes

Using the key instead of the value for determinant calculation.

Using variable names not matching the iteration unpacking.

In the dictionary comprehension, the value for each key is the matrix, so both blanks are filled with the same variable name for the matrix value, commonly mat.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that stores determinants of matrices with keys as uppercase size names.

SciPy

from scipy.linalg import det

matrices = {
    'two': [[2, 0], [0, 2]],
    'three': [[1, 2, 3], [0, 1, 4], [5, 6, 0]]
}
determinants = [1]([2].upper(): [3](matrix) for [2], matrix in matrices.items())
print(determinants)

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Adict

Bkey

Cdet

Dvalue

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same variable name for both key and value in the comprehension.

Not converting the key to uppercase.

Using a wrong function name for determinant.

The dictionary comprehension needs to create a dict, so dict is used. The keys from matrices.items() are strings like 'two', so key is used and converted to uppercase. The determinant function is det. The variable names in the comprehension must match the unpacking.