Copyright (C) 2000 Didier Leibovici

  The main References to quote
        check also  http://www.fmrib.ox.ac.uk/~didier/cv/recentpub.html

 Leibovici D and Sabatier R (1998)
   "A Singular Value Decomposition of a k-ways array for a
 Principal Component Analysis of multi-way data, the PTA-k"
                          Linear Algebra and its Applications
                                  269:307-329.
Leibovici D (2002) "PTAk Principal Tensor on k modes: an R Statistical Contributing Package, version 1.1-7". CopyRight (C) 2000 Didier Leibovici;  http://cran.r-project.org/src/contrib/PTAk_1.1-7.tar.gz



Licence definitions for PTAk version 1.1-7 :

i. academic work (Public reasearch institutes)				... licence free
ii.academic work or post-doc research work within commercial cie		... licence free until use of this work iii. use in a 	process or methodology within commercial cie			... licence A payable every year
iv. any other situation where you need to justify a licence			... licence B payable once
v. to commercialize a methodology involving the package			... licence C  payable every year

Licence Fees are different according to the commercial sector and are agreed multi-user on one site.
The software is licenced without any responsability from his author for its accuracy and proper use.


All licences are per site and so multi-user  (a site is understood as departement or a division at one geographically located  site).

For pharmaceutical companies license fees are :
licence A : 900 per year
licence B : 400 once
licence C : 600 per year (with clear mention of the double copyright to the clients who will need  licence A )

The notification of the licence and its applicabilities will be sent to you soon after your payment.

Payements of licences should be made  in GBP to :
Dr D G  Leibovici
 Branch code: 08-93-00   Account number: 13251972   Tran/Code: 77
at
The Cooperative Bank
PO Box 48
1 Balloon Street
Manchester M60 1GP
 (U.K.)

Any published work should mention two references one for the package and one with the main article given in the licence specification :

Leibovici D (2002) "PTAk Principal Tensor on k modes: an R Statistical Contributing Package, version 1.1-7". CopyRight (C) 2000 Didier Leibovici;  http://cran.r-project.org/src/contrib/PTAk_1.1-7.tar.gz

Leibovici D and Sabatier R (1998) "A Singular Value Decomposition of a k-ways array for a Principal Component Analysis of multi-way data, the PTA-k". Linear Algebra and its Applications, 269:307-329.


This package is licenced as it is without any warranty of accuracy and or proper use.

best regards
Dr Didier Leibovici
didier@fmrib.ox.ac.uk




History of Changes :
---------------------

Package: PTAk
Version: 1.1-2
Date: 2001/04/17
Title: Principal Tensor Analysis on k modes
Author: Didier Leibovici <didier@fmrib.ox.ac.uk>.
Depends: tensor (useful but not necessary)
Description: A multiway method to decompose a tensor (array) of any order,
             as a generalisation of SVD also supporting \emph{non-identity metrics} and \emph{penalisations}.
             2-way SVD with these extensions is also available. The package includes also some other multiway
             methods: PCAn (Tucker-n) and PARAFAC/CANDECOMP.
License: free for non-commercial purposes.
Maintainer: Didier Leibovici <didier@fmrib.ox.ac.uk>.
URL: http://www.fmrib.ox.ac.uk/~didier
#############################################
TO INSTALL see instructions in R documentation
#############################################
 
#################
Package: PTAk
Version: 1.1-2
Date: 2001/02/22
If one does not want to use the tensor package the default arguments of CONTRACTION
and CONTRACTION.list has to be change with usetensor=FALSE.

Some C++ code are currently developed  to speed the core algorithms.
 #
Package: PTAk
Version: 1.1-2
Date: 2001/04/17
 smoothing option allows different smoothing for different Principal Tensors.
 #
Package: PTAk
Version: 1.1-4
Date: 2001/06/06
  just updating few Rd mistakes for R 1.3.0
Package: PTAk
Version: 1.1-5
Date: 2002/05/08
  just updating  for R 1.5.0
Package: PTAk
Version: 1.1-6
Date: 2002/05/08
  just updating  for R 1.5.0
Package: PTAk
Version: 1.1-5
Date: 2003/06/06
  just updating  for R 1.7.0
