release_notes.txt

张量分析工具

Tensor Toolbox version 2.2 by Brett W. Bader and Tamara G. Kolda.
Copyright 2007, Sandia National Laboratories.

============================================
Changes from Version 2.1 (December 1, 2006)
============================================
General:
- Added INSTALL.txt with installation instructions.
- Updated copyright date from 2006 to 2007 throughout.

Classes: tensor and sptensor
- Added transpose and ctranspose functions that throw an error
  (transpose is not supported for tensors, but previously would do
  nothing as if it *had* performed the transpose).
- Added ldivide, rdivide, lmdivide, and rmdivide, though they all work
  only with scalars.

Class: tensor
- Added isequal.
- Made find slightly more efficient in the case where the
  corresponding values are not also returned.
- Fixed bug in assigning elements to 1-dimensional tensors.

Class: sptensor
- Cleaner display with disp or display functions.
- Added checks against invalid sizes and subscripts for tensor
  construction and subscripted reference and assignment.
- Fixed bug where the index 58 was confused with the character ':'
  in subscripted reference and assignment.
- Made results of logical operators consistent with how sparse
  matrices work, i.e., produces a dense tensor iff the equivalent
  command on a sparse matric would do the same.
- Plus and minus now work with a scalar or dense tensor, and the
  result in those cases is dense.
- Added ability to do .* with a scalar.
- Made it so that isequal now works with dense tensors and will return
  true is the two tensors are equivalent.
- Fixed bugs in double and squeeze on an all-zero sparse tensor.

============================================
Changes from Version 2.0 (September 6, 2006)
============================================
All
- innerprod: Added checks that sizes match
- Improved subscripted assignment for tensor and sptensor. Now
  supports assignment to a scalar (i.e., assign every element to that
  scalar) and growth in both the size and number of dimensions.

Class: tensor
- Added new function: nnz
- tenfun (and most relational operations): Fixed major bug is
  dense-sparse comparisons.

Class: sptensor 
- Added new functions: not, and, or, xor, eq, ne, le, lt, ge, gt, isequal
- sptensor: Fixed bug where a 1D tensor was not correctly converted to
  a sparse tensor. Also, added ability to accept an MDA as an input
  and to accept a list of logical values as well as numerics.
- subsref: Fixed bug on subscripted reference to an empty tensor.
- ttt: Major overhaul that fixes a number of bugs and improves
  efficiency dramatically.
- nvecs: Improved efficiency by converting to MATLAB sparse matrix
  and calling eigs on that rather than calling eigs with the aatx
  function. 
- disp/display: Fixed bug that caused tensors with a *single* element
  to display incorrectly.
- full: Fixed bug that caused it to fail if called on a completely
  empty tensor.

Class: ttensor
- innerprod/norm/nvecs: Improved efficiency.
- ttm: Removed errant debug print statements.

Class: ktensor
- datadisp.m: Minor changes to formatting.

Other
- License.txt: Removed an errant "7.3" that was in the text. 
- Fixed top-level contents file and added version information so that
  it will show up from MATLAB's ver command.

=========================================
Changes from Version 1.0 (April 13, 2006)
=========================================

Classes
- Added support for sparse tensors (sptensor and sptenmat)
- Renamed tensor_as_matrix to tenmat
- Renamed tucker_tensor to ttensor
- Renamed cp_tensor to ktensor
- Many functions have substantially improved efficiency

Changes to the tensor class
- Removed functions: issamesize, order, shiftdim
- Renamed functions: multiarrayop to tenfun
- New functions: collapse, contract, find, full, innerprod, mttkrp, nvecs,
  scale

Changes to the ktensor class (formerly cp_tensor)
- Removed functions: issamesize, order
- New functions: datadisp, double, end, fixsigns, innerprod, mttkrp,
  nvecs, times, ttm 

Changes to the ttensor class (formerly tucker_tensor)
- Removed functions: issamesize, order
- New functions: double, end, innerprod, mttkrp, norm, nvecs, ttm, ttv  

Changes to the tenmat class (formerly tensor_as_matrix)
- New functions: end, minus, norm, plus, uminus, uplus

Changes to examples, algorithms, and documentation
- The examples directory no longer exists.
- Instead, documentation has been incorporated directly into the
  MATLAB help navigator.
- Also, a new algorithms directory has been added with two ALS methods
  for CANDECOMP/PARAFAC and Tucker.

$Id: RELEASE_NOTES.txt,v 1.11 2007/01/10 23:22:20 tgkolda Exp $