mode returns a wrong answer for row vectors

[David Bateman]

David Bateman wrote:

> However, while looking at the way this failed, it points to another
> issue. Consider the indexing case
> 
> t = ones(3,3,3);
> t(:,4)
> t(true(3,1),4)
> 
> which with both Octave 3.1.x and MatlabR2007b return [1;1;1], where as
> 
> t(false(3,1),4)
> t([],4)
> 
> both return a 0-by-1 matrix in MatlabR2007b, but fail with an indexing
> error in Octave. My solution to this was to use the short_freeze
> indexing function even if one of the indices are empty. Is there a
> reason not to do this?
>

Ok, I can see why. If the trailing dimension is empty, my patch can't
work. Alternative fix attached..

D.
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