This toolbox is not tested as its equivalent Matlab version. It is mostly for
demonstrating the feasibility of the adaptation to Scilab of Matlab tools.


- VERSION 2.0 PRE 3 released on July 31, 2006
  * compatibility with my Scilab SYMBOLIC TOOLBOX and my OVERLOADING MODULE,
    however still problems for overloading the function null which is often
    invoked as some_list(3) = null(), probably other problems...
    See related modifications in function uplft.sci.
  * function hlp copied from the symbolic toolbox, compatible with
    overloaded functions (see overloading module).
  * functions sym2lfr and symtreed rewritten (don't use any more Maple
    but my Symbolic Toolbox).
  * gmorton function might have a symbolic argument
  * tutorial (sections realization and missile modelling) rewritten
    considering the new version of functions gmorton, sym2lfr and symtreed.
  * function dcgain, bug in blk.desc fixed.
  * directory 'man' (html help files) generated automatically using
    the perl script hlp2man.pl (some .sci files have been slightly modified
    for compatibility with this script).
  * directory 'doc/s_lfrt_doc' (html help files) generated automatically using
    the perl script hlp2html.pl (some .sci files have been slightly modified
    for compatibility with this script).
  * two bugs fixed in function distlfr (i of Matlab replaced by %i and
    problem of indices for comparison with a constant lfr-object)


- VERSION 2.0 PRE 2 released on February 1, 2006
  * function unnormalize ported to Scilab.
  * function lfrs with additional nominal value input argument.
  * function distlfr adapted to unnormalization (warning rather than error).
  * function lfr with improved bounds definition (min/max is no longer default
             for full blocks, etc... not yet finished)
             nominal value supported in scalar real min/max-case.
  * function %lfr_size and sizelfr better display of norm nounded uncertainties
             and %lfr_size(x,'*') defined for isempty function.
  * lfr-object was a tlist, now it is a mlist (%lfr_size is now recognized).
  * function rlfr, size of x.blk.desc updated.
  * Toolbox manual updated but HTML files of examples not yet updated.


- VERSION 2.0 PRE 1 released on January 1, 2006
This is a pre-release, in particular, the toolbox manual must
be updated on account of last minute change of several functions.
Bounds of full blocks are not yet treated....
This first release is numbered 2.0 because it is similar to the
MATLAB version numbered 2.0.