NumPy - Indexing and Slicing
Which of the following is the correct syntax to access the element in the 2nd row and 2nd column of a numpy 2D array named
matrix?Which of the following is the correct syntax to access the element in the 2nd row and 2nd column of a numpy 2D array named matrix?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Understand numpy indexing syntax
Numpy arrays use square brackets with comma-separated indices for multi-dimensional arrays.Step 2: Identify correct syntax
matrix[1,1] accesses 2nd row and 2nd column correctly. matrix[1][1] also works but is less efficient.Final Answer:
matrix[1,1] -> Option AQuick Check:
Use comma inside brackets for 2D indexing [OK]
Quick Trick: Use comma inside brackets for 2D array indexing [OK]
Common Mistakes:
- Using parentheses instead of brackets
- Using double brackets inefficiently
- Using 1-based indices
Master "Indexing and Slicing" in NumPy
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