A Symmetric Rank-One Quasi-Newton Method for Nonnegative Matrix Factorization

Figure 2

Relative errors of approximation against iteration number for SR1, fnmae, pnm, AS, alsq, and nnmalq with the matrix 𝑉∈ℝ^2000×800 for the approximate rank 𝑘=5.

(a)

(b)