NumPy - Aggregation Functions
What is the output of this code?
import numpy as np arr = np.array([[2, 4], [6, 8]]) print(np.mean(arr, axis=0))
What is the output of this code?
medium📝 Predict Output Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Understand axis=0
Calculates mean down each column.Step 2: Calculate means
Column 1: (2+6)/2 = 4, Column 2: (4+8)/2 = 6Final Answer:
[4. 6.] -> Option BQuick Check:
Mean per column calculated correctly [OK]
Quick Trick: Axis 0 averages columns [OK]
Common Mistakes:
- Confusing axis=0 with axis=1
- Calculating sum instead of mean
Master "Aggregation Functions" in NumPy
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