NumPy - Broadcasting
Which of the following is the correct syntax to add a 1D array to each row of a 2D array using broadcasting?
Which of the following is the correct syntax to add a 1D array to each row of a 2D array using broadcasting?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Understand shapes of arrays
A 2D array plus a 1D array with matching trailing dimension broadcasts correctly.Step 2: Identify correct syntax
Adding arr1d directly to arr2d adds arr1d to each row by broadcasting.Final Answer:
result = arr2d + arr1d -> Option AQuick Check:
Direct addition with compatible shapes broadcasts correctly [OK]
Quick Trick: Add 1D array directly to 2D array rows if shapes align [OK]
Common Mistakes:
- Using reshape incorrectly causing shape mismatch
- Transposing 1D arrays which has no effect
- Flattening arrays unnecessarily
Master "Broadcasting" in NumPy
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