Table 1.

Robustness of NMF Basis Vectors to Noise

Noise added	NMF basis vectors	Reconstructed data	Original data
0.2	0.933	0.930	0.943
0.5	0.879	0.893	0.781
1	0.865	0.816	0.573
5	0.368	0.313	0.159

Gaussian noise was added to the original data and was quantified as a multiplier of the standard deviation of the original data set. (NMF basis vectors) The average correlation of basis vectors from the original data to the basis vectors from original data with added noise. (Reconstructed data) The average correlation of the reconstructed data from the basis vectors with and without noise. (Original data) Average correlation of the original data to the data with added noise