[Octave-bug-tracker] [bug #35666] wrong matrix division when normalizing columns

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?35666>

                 Summary: wrong matrix division when normalizing columns
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Wed 29 Feb 2012 11:48:47 AM UTC
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Documentation
                  Status: None
             Assigned to: None
         Originator Name: Marko Seric
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.2.3
        Operating System: GNU/Linux

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Details:

In Chapter "21.4 Some Examples of Usage", this is the code to normalize the
columns of a matrix:


       s = norm (X, "columns");
       X = diag (s) \ X;


this produces an error with non-conformant operands:


       X = [1,2,3; 4 5 6];
       s = norm(X,"columns");
       X = diag(s) \ X;
       error: operator \: nonconformant arguments (op1 is 3x3, op2 is 2x3)


The correct way should be


X = X / diag(s)







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