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[Octave-bug-tracker] [bug #49204] addition of two dissimilar vectors

From: anonymous
Subject: [Octave-bug-tracker] [bug #49204] addition of two dissimilar vectors
Date: Wed, 28 Sep 2016 06:23:26 +0000 (UTC)
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0


                 Summary: addition of two dissimilar vectors
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Wed 28 Sep 2016 06:23:24 AM UTC
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.0.3
        Operating System: Microsoft Windows



Following problems in a book (GNU Octave Packt Publishing) I added two
dissimilar vectors b = [1 2 3] and c=[1;2;3]: A 1x3 vector and the other a 3x1
vector. Since I tend to react too quickly I questioned that I understood what
I was looking at, but regardless Octave gave me a 3x3 vector: 

                             2 3 4
                             3 4 5
                             4 5 6
The Book said that I should have seen an error, not a matrix! But assuming I
might be doing something wrong I tried it out in scilab and I got the error. I
went back to my linear algebra book and it said that I cannot add a 1x3 to a
3x1, and I looked it up on the internet and it too said that. 

But I wondered how in the world can a major piece of code be wrong on such a
basic operation. This kind of a problem is covered on the first day of linear
algebra 101. 

Am I doing something wrong or is there a bug in Octave?


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