[Solved] What will be the shape of the result after broadcasting in this code?import numpy as np X = np.ones((4, 1, 3)) Y = np.ones((1, 5, 1)) Z = X + Y print(Z.shape) | NumPy

NumPy - Broadcasting

What will be the shape of the result after broadcasting in this code?

import numpy as np
X = np.ones((4, 1, 3))
Y = np.ones((1, 5, 1))
Z = X + Y
print(Z.shape)

A(4, 5, 1)

B(4, 1, 1)

C(1, 5, 3)

D(4, 5, 3)

Step-by-Step Solution

Solution:

Step 1: Compare shapes dimension-wise
X shape: (4,1,3), Y shape: (1,5,1). Broadcasting rules apply per dimension.
Step 2: Determine broadcasted shape
Dimensions: 4 vs 1 -> 4, 1 vs 5 -> 5, 3 vs 1 -> 3. Result shape is (4,5,3).
Final Answer:
(4, 5, 3) -> Option D
Quick Check:
Broadcast shape = max dims or 1 [OK]

Quick Trick: Broadcast shape is max dimension size or 1 per axis [OK]

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