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[Octave-bug-tracker] [bug #34173] Possible bug with multiplification wit

From: Mikael
Subject: [Octave-bug-tracker] [bug #34173] Possible bug with multiplification with matrices and "-" sign
Date: Tue, 30 Aug 2011 11:03:45 +0000
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv: Gecko/20110803 Firefox/3.6.20 ( .NET CLR 3.5.30729)


                 Summary: Possible bug with multiplification with matrices and
"-" sign
                 Project: GNU Octave
            Submitted by: mandolin
            Submitted on: Tue 30 Aug 2011 11:03:40 AM GMT
                Category: GUI
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Crash
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.4.2
        Operating System: GNU/Linux



I have found a strange problem. 

I have a big sparse matrix Q  (43750 43750) and a vector x

Y = -Q*x; 

gives the error message:

but with 
Y = -(Q*x); 
Z = Q*x;
Y = -Z;

works fine.. should give same results.



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