NMF                     Non-negative Matrix Factorization Algorithms
                        (NMF)
NTD                     Non-negative Tucker Decomposition Algorithms
                        (NTD)
NTF                     Non-negative CP Decomposition Algorithms (NTF)
nnTensor-package        Non-Negative Tensor Decomposition
plotTensor3D            Plot function for visualization of tensor data
                        structure
recTensor               Tensor Reconstruction from core tensor (S) and
                        factor matrices (A)
toyModel                Toy model data for using NMF, NTF, and NTD
