[Octave-bug-tracker] [bug #45293] Inconsistent behaviour when appending to empty matrices

[Alexander Klein]

URL:
  <http://savannah.gnu.org/bugs/?45293>

                 Summary: Inconsistent behaviour when appending to empty
matrices
                 Project: GNU Octave
            Submitted by: matalex
            Submitted on: Mi 10 Jun 2015 11:26:35 GMT
                Category: Octave Function
                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: 3.8.2
        Operating System: Any

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Details:

The other day I discovered that Octave's behaviour when appending to empty
fields depends on the dimensionality of what is appended and the dimension you
append to, see the final example below, which is completely different from
what happens above it.

If this is intended behaviour, then maybe some warning should be issued!


octave:74> c=[];c(end+1)=1
c =  1
octave:75> c=[];c(end+1,:)=ones(1,2)
c =

   1   1

octave:76> c=[];c(:,end+1)=ones(2,1)
c =

   1
   1

octave:77> c=[];c(end+1,:,:)=ones(2)
c =

ans(:,:,1) =

   1   1

ans(:,:,2) =

   1   1

octave:78> c=[];c(:,:,end+1)=ones(2)
c =

ans(:,:,1) =

   0   0
   0   0

ans(:,:,2) =

   1   1
   1   1





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