[Octave-bug-tracker] [bug #60190] null gives warning: colon arguments should be scalars for single row matrix

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?60190>

                 Summary: null gives warning: colon arguments should be
scalars for single row matrix
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Mon 08 Mar 2021 09:01:15 AM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error or Warning
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: 6.1.0
         Discussion Lock: Any
        Operating System: Any

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Details:

The following gives a warning:


null(1:3);


This is caused by the line

s = diag (S);

This makes the vector S a matrix when A, the input matrix is a 1 by n matrix.
Normally, when the number of rows is greater than one this makes the S matrix
a vector. To fix update the above line to:

if (rows (A)>1)
  s = diag (S);
else
  s = S.';
end





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