Not enough input arguments.!!!!

hi, when i exécute this function an error message appears: Error using get_block (line 9) Not enough input arguments.!!!!!!

function block = get_block( Mat1, block_number )
% returns block of matrix
% 1: Mat2(1:2,1:3)
% 2: Mat2(1:2,4:6)
% 3: Mat2(3:4,1:3)
% 4: Mat2(3:4,4:6)
%

switch block_number
    case 1
        block = Mat1(1:2,1:3);
    case 2
        block = Mat1(1:2,4:6);
    case 3
        block = Mat1(3:4,1:3);
    case 4
        block = Mat1(3:4,4:6);
    otherwise
        error('Matrix only has 4 blocks')
end
end

[Guillaume]

Note that another implementation of your function would be:

function block = get_block(Mat1, block_number)
   assert(size(Mat1) == [4, 6], 'Invalid matrix size');
   blocks = mat2cell(Mat1, [2 2], [3 3])';  %split matrix into blocks and transpose since indexing is row major
   block = blocks(block_number);
end

Answer 1

[Guillaume]

The problem is with the way you call the function, not with the code of the function. You need to pass two arguments to the function when you call it, e.g:

m = reshape(1:24, 4, 6); %demo matrix
block = get_block(m, 3)