Bug#506833: Scilab fails VERY SIMPLE computation.

KOBAYASHI Hiroyuki kobayashi at bme.oit.ac.jp
Tue Nov 25 10:33:18 UTC 2008


Hello, Sylvestre Ledru.

Thank you very much for your rapid reply.  I understand.
I'm looking forward to use the new version.

Thanks again.

At Tue, 25 Nov 2008 10:27:48 +0100,
Sylvestre Ledru wrote:
> 
> merge 499565 506833
> thanks
> 
> Actually, it is not a Scilab bug but a gfortran
> See: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37863
> Upcoming version of Scilab (5.0.3) contains a workaround for this bug.
> 
> Btw, packages are available here:
> http://www.scilab.org/team/sylvestre.ledru/
> until it is uploaded in Debian.
> 
> Sylvestre
> 
> 
> 
> Le mardi 25 novembre 2008 à 13:55 +0900, KOBAYASHI Hiroyuki a écrit :
> > Package: scilab
> > Version: 4.1.2-6
> > 
> > 
> > Scilab mistakes computation of (a certain type of?) product of 2 matrices.
> > Here is an example:
> > 
> > --> A = [3 1 4; 1 5 9; 2 6 5];
> > 
> > --> inv(A)*A
> >  ans  =
> >  
> >     2.  - 8.327D-17  - 1.804D-16  
> >     0.    2.           0.         
> >     0.    0.           1.         
> >  
> > 
> > In Windows, it results with an identity matrix successfully.
> > 
> > I am using a several Debian GNU/Linux IA32 PCs.  Their kernels are
> > 2.6.26.1-1-686 or higher and libc6s are 2.7-16.
> > 
> > 
> > 
> > -- System Information:
> > Debian Release: lenny/sid
> >   APT prefers testing
> >   APT policy: (500, 'testing'), (500, 'stable')
> > Architecture: i386 (i686)
> > 
> > Kernel: Linux 2.6.26-1-686 (SMP w/2 CPU cores)
> > Locale: LANG=ja_JP.EUC-JP, LC_CTYPE=ja_JP.EUC-JP (charmap=EUC-JP)
> > Shell: /bin/sh linked to /bin/bash
> > 
> > Versions of packages scilab depends on:
> > ii  scilab-bin                    4.1.2-6    Matrix-based scientific software p
> > ii  tk8.4 [wish]                  8.4.19-2   Tk toolkit for Tcl and X11, v8.4 -
> > 
> > Versions of packages scilab recommends:
> > ii  scilab-doc                    4.1.2-6    Matrix-based scientific software p
> > 
> > Versions of packages scilab suggests:
> > pn  gfortran                      <none>     (no description available)
> > 
> > -- no debconf information
> > ----
> > KOBAYASHI, Hiroyuki
> > 
> > 
> > 
> 





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