Re: [Bug 106757] Re: scilab gives wrong results

2007-06-25 Thread gloin12

Thank you for your message.

I have installed scilab from the ubuntu repository now and I could
not reproduce the bug. So I guess that means it works now.

Best wishes
Gunther 


 Original-Nachricht 
Datum: Sun, 24 Jun 2007 10:54:06 -
Von: Sylvestre Ledru [EMAIL PROTECTED]
An: [EMAIL PROTECTED]
Betreff: [Bug 106757] Re: scilab gives wrong results

 As I don't know which exact debian/ubuntu version you are using, I am not
 completely sure but I would say that it is a gfortran bug (see :
 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28354 )
 We fixed this problem in the debian package which should be available in
 ubuntu now too
 
 
 ** Changed in: scilab (Ubuntu)
Status: New = Fix Released
 
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[Bug 106757] scilab gives wrong results

2007-04-15 Thread gloin12
Public bug reported:

Binary package hint: scilab

I encountered the following bug when running the attached scilab program
test.sci in scilab 4.0:

--A=[1,0.5;0.5,1];
--[U,S,V]=svd(A);
--B=U*S*V'
--A-B

gives

--B=U*S*V'
 B  =

0. 0.5
0.50.

--A-B
 ans  =

   1.0E-15 *

0.22204460.3330669
0.   0.1110223

As you can see, the value for B is wrong, since B should equal A.
On the other hand A-B is practically 0.

The problem occured on two different platforms (running ubuntu) using the
debian package.
However, it does not occur in scilab 4.1 as downloaded from www.scilab.org,
i.e. here we get the correct answer for B

--B=U*S*V'
 B  =

1. 0.5
0.51.

--A-B
 ans  =

   1.0E-15 *

0.22204460.3330669
0.   0.1110223

I have reported this to Torsten Werner, the dedian-package maintainer, who said 
that he knew that the scilab package in ubuntu
is completely broken, but that there is no problem of that sort on a debian 
platform.

** Affects: scilab (Ubuntu)
 Importance: Undecided
 Status: Unconfirmed

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