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Identify the error in this code using SciPy and NumPy:

medium📝 Debug Q14 of 15
SciPy - Basics and Scientific Computing
Identify the error in this code using SciPy and NumPy:
import numpy as np
from scipy import optimize

x = np.array([1, 2, 3])
result = optimize.minimize(np.sum, x)
print(result.fun)
Anp.sum is not a valid function for minimize; it needs a function of one variable.
Bnp.array should be a list, not an array.
Coptimize.minimize requires two arguments, but only one is given.
DNo error; code runs fine.
Step-by-Step Solution
Solution:
  1. Step 1: Verify imports and variable definition

    Imports are correct; x is a valid NumPy array.
  2. Step 2: Analyze optimize.minimize call

    np.sum is not a valid objective function for minimize because it does not take a single vector argument and return a scalar in the expected way. It sums all elements immediately, so it does not behave as a function of a variable vector for optimization.
  3. Final Answer:

    np.sum is not a valid function for minimize; it needs a function of one variable. -> Option A
  4. Quick Check:

    Objective function must accept a vector input and return scalar [OK]
Quick Trick: Objective function for minimize must accept vector input [OK]
Common Mistakes:
MISTAKES
  • Thinking np.sum is invalid for vector optimization
  • Believing np.array must be a list
  • Misreading argument count for minimize

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