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What does np.vstack() do with arrays?

easy📝 Conceptual Q11 of 15
NumPy - Array Manipulation
What does np.vstack() do with arrays?
AStacks arrays vertically, adding rows
BStacks arrays horizontally, adding columns
CFlattens arrays into one dimension
DSplits arrays into smaller parts
Step-by-Step Solution
Solution:

  1. Step 1: Understand vertical stacking

    np.vstack() stacks arrays by adding rows one below another.

  2. Step 2: Compare with horizontal stacking

    np.hstack() stacks arrays side by side by adding columns, so it is different.

  3. Final Answer:

    Stacks arrays vertically, adding rows -> Option A

  4. Quick Check:

    np.vstack() = vertical stack [OK]
Quick Trick: Remember 'v' in vstack means vertical stacking [OK]
Common Mistakes:
  • Confusing vertical and horizontal stacking
  • Thinking vstack flattens arrays
  • Assuming vstack splits arrays

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