From bug-octave-request at bevo dot che dot wisc dot edu  Sun Nov 28 07:50:38 1999
Subject: Re: not compatable with Matlab (matrix problem)
From: Rafael Laboissiere <rafael at icp dot inpg dot fr>
To: Mirek Kwasniak <mirek at zind dot ikem dot pwr dot wroc dot pl>
Cc: Dirk Eddelbuettel <edd at debian dot org>,         Shengchao Li <lish@ee.eng.ohio-state.edu>,         bug-octave@bevo.che.wisc.edu
Date: Sun, 28 Nov 1999 14:50:27 +0100

On Sun, Nov 28, 1999 at 02:11:02PM +0100, Mirek Kwasniak wrote:

> b=[ 1
> 2]
> 
> is column vector and in octave works:
> 
> [ a b ]
> [ a b*(1+1) ]
> [ a 1*b ]
> 
> but not
> 
> [a (1+1)*b]
> 
> > Finally, and just to clarify, nobody ever claimed that Octave's goal was to
> > be perfectly Matlab compatible. If you want Matlab, you know where to get
> > it ...  
> 
> but this is a bug.

I do not think so.  The above expression groups syntactically like:

    [(a (1+1))*(b)] 

It is totally normal that it does not work.  Braindead Matlab (v. 5.2) gives
different results for the following expressions:

    [a(1+1) *b]
    [a (1+1)*b]

which is an unacceptable situation, because the semantics of expressions
should not depend on the place of white spaces.  I vote for not changing the
behavior of Octave.

--
Rafael Laboissiere <rafael at icp dot inpg dot fr>
Institut de la Communication Parlee / INP Grenoble, France
http://www.icp.inpg.fr/~rafael



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