[Octave-bug-tracker] [bug #37411] Diagonal matrix attribution error and diag function bugs

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?37411>

                 Summary: Diagonal matrix attribution error and diag function
bugs
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Thu 20 Sep 2012 12:13:08 PM UTC
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Steffen Hoernig
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.6.2
        Operating System: Microsoft Windows

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Details:

The following code creates a square matrix with [1,0] on the diagonal and
works fine

diag([1,0])


Now the following defines the unit vector e1 as a column of the identity
matrix. Note that it wrongy inherits "diagonal matrix" status from Id.

Id = eye(2); e1 = Id(:,1)


As a result, the diag function returns the number 1 instead of the above
diagonal matrix diag([1,0]):

diag(e1)





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