Re: cell behavior

[David Bateman]

Daniel J Sebald wrote:

> Is the following proper behavior of cell assignments?  (2.1.64)
>
> octave:124> C = cell(2,1)
> C =
>
> {
>  [1,1] = [](0x0)
>  [2,1] = [](0x0)
> }
>
> octave:125> C(2) = []
> C =
>
> {
>  [1,1] = [](0x0)
> }
>
> It could be interpretted two ways, but my intuition would be that C 
> should remain just as it already is.
>
> I have an iterative search that some times comes up empty.  (I realize 
> it is possible to fix this with a conditional "isempty".)
>
> Dan


Dan,

This is intentional. The equivalent for a matrix might be

octave:1> M = rand(2,2)

M =

 0.402375  0.721572
 0.164786  0.040139

octave:2> M(:,2) = []

M =

 0.40238
 0.16479

Assigning a part of a matrix or cell array to the empty matrix has the 
effect of deleting that part of the matrix. Matlab v7sp1 gives the same 
result


>> C = cell(2,1)

C =

    []
    []

>> C(2) = []

C =

   {[]}


Octave and matlab also agree for the version "C{2} = []" which assigns 
an empty matrix rather than deletes the row. Maybe this is what you 
wanted to write..

Regards
David

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