cell

[James Sherman Jr.]

If your matrices are all the same size (which I assume is the case since you
need to add them), it would probably be better to store them in a 3d array
since it will be easier to access them.  In your example, you could do:
A = zeros(10, 10, 10);
A(:, :, 1) = a matrix10x10
A(:, :, 2) = a matrix10x10
...
A(:, :, 10) = a matrix10x10

Then to add them up, all you need to do is:
sum(A, 3)

However, if you want to use cell arrays like you describe, one way to add
them up would be:
sum(reshape(cell2mat(A), 10, 10, []), 3)

But that is rather shoehorning it into a 3d array to add them up.  There may
be a more direct way to add them besides just doing a for loop.

On Tue, Jun 2, 2009 at 10:05 AM, Carlo Rossi <serosole at yahoo.it> wrote:

>
> Hello,
>  I have a cell
>  A = cell(10,1);
> A{1} = a matrix10x10
> A{2} = a matrix10x10
>
> A{10} = a matrix10x10
>
> Hoping it's a good way to use the cell
> now I need to sum up all matrix inside A. is there a compactway to do it?
> (I need A{1} + A{2} .......)
> thanks,
>
>
>
>
>
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