# Random Projection

> Source: https://sukruyusufkaya.com/en/glossary/random-projection
> Updated: 2026-05-13T20:02:16.369Z
> Type: glossary
> Category: makine-ogrenmesi
**TLDR:** A computationally efficient method that projects high-dimensional data into a lower-dimensional space while approximately preserving distances.

<p>Random projection is a surprisingly powerful yet simple approach to dimensionality reduction. Based on the Johnson-Lindenstrauss idea, it shows that pairwise distances can be approximately preserved under random projections. This makes it especially important for very large, high-dimensional datasets where computational efficiency matters. Although interpretability is limited, its speed and scalability make it highly practical.</p>