[Solved] Find the error in this code snippet:import numpy as np arr = np.array([1, 2, 3, 4]) std_dev = np.std(arr, axis=1) print(std_dev) | NumPy

NumPy - Aggregation Functions

Find the error in this code snippet:

import numpy as np
arr = np.array([1, 2, 3, 4])
std_dev = np.std(arr, axis=1)
print(std_dev)

Aaxis=1 is invalid for 1D array

Bnp.std() requires axis=0 for 1D arrays

Cnp.std() cannot be used on numpy arrays

DMissing parentheses in np.std

Step-by-Step Solution

Solution:

Step 1: Understand array shape
arr is 1D with shape (4,), so axis=1 does not exist.
Step 2: Check axis parameter validity
axis=1 is invalid for 1D arrays; axis=0 or None should be used.
Final Answer:
axis=1 is invalid for 1D array -> Option A
Quick Check:
1D arrays have axis 0 only [OK]

Quick Trick: Use axis=0 or omit axis for 1D arrays [OK]

Common Mistakes:

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