[Octave-bug-tracker] [bug #54143] Why can't issorted() work on matrices?

[Dan Sebald]

URL:
  <http://savannah.gnu.org/bugs/?54143>

                 Summary: Why can't issorted() work on matrices?
                 Project: GNU Octave
            Submitted by: sebald
            Submitted on: Mon 18 Jun 2018 07:44:17 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

The sort() function works on matrices, yet the issorted() function doesn't,
e.g.,


octave:7> X = magic(5);
octave:8> sort(X)
ans =

    4    5    1    2    3
   10    6    7    8    9
   11   12   13   14   15
   17   18   19   20   16
   23   24   25   21   22

octave:9> issorted(sort(X))
error: issorted: needs a vector


One would think that issorted() is a counterpart to sort(), so it should work
on whatever the sorted routine creates.




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