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What does boolean indexing in numpy allow you to do?

easy📝 Conceptual Q11 of 15
NumPy - Indexing and Slicing
What does boolean indexing in numpy allow you to do?
ACreate a new array filled with zeros
BChange the data type of an array
CSort the array elements in ascending order
DSelect elements from an array using a True/False mask
Step-by-Step Solution
Solution:
  1. Step 1: Understand boolean indexing concept

    Boolean indexing uses a True/False array to pick elements from another array.
  2. Step 2: Identify the correct operation

    Only Select elements from an array using a True/False mask describes selecting elements based on True/False values.
  3. Final Answer:

    Select elements from an array using a True/False mask -> Option D
  4. Quick Check:

    Boolean indexing = Select elements [OK]
Quick Trick: Boolean mask picks elements where True appears [OK]
Common Mistakes:
  • Confusing boolean indexing with sorting
  • Thinking it changes data types
  • Assuming it creates new arrays with zeros

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