midNumPy
What is stacking in NumPy?
Updated May 17, 2026
Short answer
Stacking combines multiple arrays into one along a new axis.
Deep explanation
Functions like vstack and hstack merge arrays vertically or horizontally, useful in dataset construction.
Real-world example
Combining batches of training data.
Common mistakes
- Mismatched dimensions during stacking.
Follow-up questions
- Difference between stack and concatenate?
- What is axis in stacking?