Putting a matrix into an array

Hi all!

Firstly, I am not exactly sure this is possible, so forgive me if I am asking a redundant question.

I have a series of objects that are same in structure, and I want to group them into an array to keep them together. However, upon initializing such an object with a function, it returns a 2-D matrix, and the program gives me an error: "Subscripted assignment dimension mismatch.". This is the code:

 T(1) = makehgtform('translate', [1 1 0]);
T(2) = makehgtform('translate', [1 -1 0]);
T(3) = makehgtform('translate', [-1 1 0]);
T(4) = makehgtform('translate', [-1 -1 0]);

I hope you understand what I'm trying to do, and what the problem is.

Thanks in advance! :)

Answer 1

[Stephen23]

Into a 3D array:

T = nan(4,4,N);
T(:,:,1) = makehgtform('translate', [1,1,0]);
T(:,:,2) = makehgtform('translate', [1,-1,0]);
etc

Or a cell array:

T = cell(1,N);
T{1} = makehgtform('translate', [1,1,0]);
T{2} = makehgtform('translate', [1,-1,0]);
etc

Where N is the number of matrices you will have.

[Filip Davidovic]

I get the exact same error.

[Filip Davidovic]

I get the error: "Cell contents assignment to a non-cell array object.".

[Stephen23]

@Filip Davidovic: you need to preallocate the matrix or cell array, as shown in my answer.