R-vignette: Principal Tensor Analysis on k modes

# -R-vignette - Principal Tensor Analysis on k Modes -

## PTAk version 1.4-0

PTAk ## A multiway method to decompose a tensor (array) of any order, as a generalisation of SVD also supporting non-identity metrics and penalisations. 2-way SVD with these extensions is also available. The package includes also some other multiway methods: PCAn (Tucker-n) and PARAFAC/CANDECOMP with these extensions. |

general ... | ... Purposes of the package
functions /UML structure ... | ... description of the structure
license GPL(>=2) ... | ... PTAk citation info
maintainer website ... | ... other useful things

## Didier G. Leibovici - GeotRYcs