[Solved] What is wrong with this code snippet for QR decomposition? from scipy.linalg import qr A = [[1, 2], [3, 4]] Q, R = qr(A) print(Q) | SciPy

SciPy - Linear Algebra (scipy.linalg)

What is wrong with this code snippet for QR decomposition?

from scipy.linalg import qr
A = [[1, 2], [3, 4]]
Q, R = qr(A)
print(Q)

ANothing is wrong with this code snippet

BThe qr function does not return two values

CMatrix A should be a numpy array, not a list of lists

DImport statement is incorrect

Step-by-Step Solution

Solution:

Step 1: Verify import statement
The import from scipy.linalg import qr is correct.
Step 2: Check qr function returns
qr(A) returns two values Q and R.
Step 3: Validate input type
List of lists for A works as qr accepts array-like inputs and converts internally.
Step 4: Check print statement
print(Q) correctly outputs the Q matrix.
Final Answer:
Nothing is wrong with this code snippet -> Option A
Quick Check:
Code runs successfully, produces correct Q and R [OK]

Quick Trick: scipy.linalg.qr accepts lists of lists as array-like input [OK]

Common Mistakes:

MISTAKES

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What is wrong with this code snippet for QR decomposition?