Given two numpy arrays a and b of the same shape, which code snippet correctly performs an in-place element-wise subtraction of b from a?

hard📝 Application Q9 of 15

NumPy - Array Operations

Given two numpy arrays a and b of the same shape, which code snippet correctly performs an in-place element-wise subtraction of b from a?

Aa -= b

Bnp.subtract(a, b)

Ca = a - b

Da.subtract(b)

Step-by-Step Solution

Solution:

Step 1: Understand in-place subtraction syntax
The operator '-=' subtracts elements of b from a in-place.
Step 2: Check other options
a = a - b creates new array; np.subtract(a, b) returns new array without modifying a; a.subtract(b) is invalid.
Final Answer:
a -= b -> Option A
Quick Check:
Use '-=' for in-place subtraction [OK]

Quick Trick: Use '-=' to subtract arrays in-place [OK]

Common Mistakes:

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