NumPy - Aggregation Functions
Which of the following is the correct syntax to sum elements of a numpy array
arr along axis 1?Which of the following is the correct syntax to sum elements of a numpy array arr along axis 1?
easy📝 Conceptual Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Check correct axis parameter type
The axis parameter must be an integer, not a string or list.Step 2: Validate syntax
np.sum(arr, axis=1) usesaxis=1correctly. np.sum(arr, 1, axis=1) provides multiple values for the axis parameter, which is invalid. np.sum(arr, axis='1') uses a string which is invalid. np.sum(arr, axis=[1]) uses a list which is invalid.Final Answer:
np.sum(arr, axis=1) -> Option AQuick Check:
axis parameter must be int, not string or list [OK]
Quick Trick: Use integer for axis, no quotes or lists [OK]
Common Mistakes:
- Passing axis as string
- Passing axis as list
- Duplicating axis argument
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