Convert Small Object Dataset annotations from mat to csv

convert_to_csv.m

% Retrieving the data
data = load('SUN_small_obj_train.mat');
struct_arr = getfield(data, 'SUN_small_obj_train');

% Converting each row to a its corresponding csv
fileID = fopen('SUN_small_obj_train.csv','w');
[nrows,ncols] = size(struct_arr);
for row = 1:nrows
     for col = 1:ncols
        if isempty(struct_arr{row,col})
            value = '_';
        else
            cell_value = struct_arr{row,col};
            [r, c] = size(cell_value);
            value = num2str(cell_value(1,:));
            for inner_row = 2:r
                value = strcat(value, ';',num2str(cell_value(inner_row,:)));
            end
        end
        if col ~= ncols
            fprintf(fileID,'%s,',value);
        else
            fprintf(fileID,'%s',value);
        end
     end
     fprintf(fileID,'\n');
end
fclose(fileID);