[Octave-bug-tracker] [bug #50626] Indexing with "end" does not work for matrices of intervals

[Joel Dahne]

URL:
  <http://savannah.gnu.org/bugs/?50626>

                 Summary: Indexing with "end" does not work for matrices of
intervals
                 Project: GNU Octave
            Submitted by: urathai
            Submitted on: Fri 24 Mar 2017 02:25:14 PM UTC
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.1
        Operating System: GNU/Linux

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Details:

When getting a subset of an interval matrix using `1:end` yields only the
first element, the `end` syntax seems to always evaluate to 1.

For a normal vector we have

>> v = [1, 2, 3, 4, 5];
>> v(1:end)
ans = [1, 2, 3, 4, 5]


For a vector of intervals we instead get

>> v = infsup([1, 2, 3, 4, 5]);
>> v(1:end)
ans = [1]

Here `1:end` should be the same as `1:5` but it evaluates to `1:1`.

>From what I can tell the problems seems to occur before the call to `subsref`.
The input argument to `subsref` are consistent with `end` being evaluated to
1.




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