Question

Suppose A = [1 2 3;4 5 6;7 8 9]
I want to convert it to B = [{[1,2,3]};{[4,5,6]};{[7,8,9]}]
How can I do that in an easy way?

Answer 1

You can use mat2cell function.

From the documentation:

C = mat2cell(A,dim1Dist,…,dimNDist) divides array A into smaller
arrays within cell array C. Vectors dim1Dist,…dimNDist specify how
to divide the rows, columns, and (when applicable) higher dimensions
of A.

You can do it like this:

A = [1 2 3; 4 5 6; 7 8 9];
B = mat2cell(A, [1 1 1], 3);

will give you:

B={[1 2 3];[4 5 6];[7 8 9]}

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Documentation also says:

C = mat2cell(A,rowDist) divides array A into an n-by-1 cell array C,
where n == numel(rowDist).

So, if you are always going to split your matrix to rows, but not to columns, you can do it without the second parameter.

B = mat2cell(A, [1 1 1]);

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A better, generalized way would be:

mat2cell(A, ones(1, size(A, 1)), size(A, 2));