NumPy - Creating Arrays
Which of the following commands correctly creates a 4x4 identity matrix using NumPy?
Which of the following commands correctly creates a 4x4 identity matrix using NumPy?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Syntax of np.eye()
The functionnp.eye(N, M=None, k=0)creates an N x M matrix with ones on the k-th diagonal.Step 2: Creating a 4x4 identity matrix
Callingnp.eye(4)creates a 4x4 identity matrix with ones on the main diagonal (k=0 by default).Final Answer:
np.eye(4) -> Option DQuick Check:
Check shape is (4,4) and diagonal ones [OK]
Quick Trick: np.eye(n) creates n x n identity matrix by default [OK]
Common Mistakes:
- Using k=1 shifts diagonal off main
- Specifying mismatched rows and columns
- Confusing np.eye() with np.identity()
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