# nonnegative matrix factorization (under construction)

## Summary

-No Summary-

## Notes

This concept is still under construction.

## Context

This concept has the prerequisites:

- principal component analysis (NMF is motivated as an alternative to PCA.)
- Lagrange multipliers (NMF is a constrained optimization problem.)

## See also

- Sparse coding is another matrix factorization model which is useful for learning meaningful representations.