get number of sub structures in matlab

main.m
function numSubStructures = count_sub_structures(myStructure)
% Count the number of sub-structures in a given structure

    % Initialize counter variable
    numSubStructures = 0;

    % Get a list of the fieldnames in the structure
    fields = fieldnames(myStructure);

    % Loop through each field
    for ii = 1:numel(fields)
        % Check if the field is a structure
        if isstruct(myStructure.(fields{ii}))
            % If it is, increment the counter
            numSubStructures = numSubStructures + 1;
            % Recursively call this function to count sub-structures within
            % this field
            numSubStructures = numSubStructures + count_sub_structures(myStructure.(fields{ii}));
        end
    end

end
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main.m
myStructure = struct('field1', struct('subfield1', 1), 'field2', 2);
numSubStructures = count_sub_structures(myStructure);
disp(numSubStructures); % Output: 1
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