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Topic: Cell array element-wise operations
Replies: 3   Last Post: Nov 11, 2012 11:16 PM

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Doug Schwarz

Posts: 1,412
Registered: 12/7/04
Re: Cell array element-wise operations
Posted: Nov 11, 2012 11:16 PM
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In article <k7n744$b1a$>,
"Rohan " <> wrote:

> I have 2 cell arrays. Each cell array is 2D and has elements which are 2D
> matrices themselves. So I have a 2D array of 2D matrices, stored in the form
> of a cell array.
> I want to "add", element-wise, each element of each matrix with its
> corresponding element in the corresponding matrix in the other cell array.
> Is it possible to do this in one line in matlab? '+' operator and bsxfun
> clearly dont work, even though, logically speaking, bsxfun should do the
> trick for me.

If A and B are your 2 cell arrays:

C = cellfun(@(x,y){x+y},A,B);

will do it. The reason why bsxfun doesn't do what you want is that it
would perform

C(1,1) = A(1,1) + B(1,1);

but those are cells. You would need it to operate on the contents of
the cells, i.e.,

C{1,1} = A{1,1} + B{1,1};

but it doesn't do that.

Doug Schwarz
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