[Octave-bug-tracker] [bug #53033] Variable editor: allow empty cells to be edited and value cells to be emptied

[Philip Nienhuis]

URL:
  <http://savannah.gnu.org/bugs/?53033>

                 Summary: Variable editor: allow empty cells to be edited and
value cells to be emptied
                 Project: GNU Octave
            Submitted by: philipnienhuis
            Submitted on: Thu 01 Feb 2018 10:46:19 AM CET
                Category: GUI
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Matlab Compatibility
                  Status: None
             Assigned to: None
         Originator Name: philipnienhuis
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

Empty cells or struct fields cannot be assigned a value, the display '[0x0
matrix]' seems immutable (that is, I haven't found a way to assign it a value
*in the V.E.*).
Matlab allows editing of such cells so they can be assigned a value.

The other way round, editing a cell + emptying it merely sets it to empty
string (''), pressing the Del key does not work (in the latter case the
terminal shows "syntax error" and a popup appears "failed to evaluate...").
Right-clicking the cell and selecting 'clear' sets it to numeric 0, Matlab
doesn't have that option.

For cell arrays and struct fields, Matlab consistently sets the cell contents
to empty '[]' (an empty double matrix, checked by inspecting the class of the
cell value), irrespective of the original cell value class.





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