How to create a struct

There is a simple way to create a struct like the following picture, i.e ROCK = struct('ROCK0', value1, 'ROCK44', value2, 'ROCK50',value3, ....)

I was curious, is there any other ways to create a struct like the above, so i use for loop to do it, and the code is:

for m = 1 : size(rock_code,1)%Assign values to the initial cell
            row_index   = rock(:,col_ind_rk) == rock_code(m);%determine the row index according to the corresponding rock codes
            sub_rock{m} = rock(row_index,:);
end
        % Create string for each sub_rock
        str_rock = cell(1,size(rock_code,1));%create cell to store strings
        for kk = 1 : size(rock_code,1)
            str_rock{kk} = sprintf('ROCK%d',rock_code(kk));
        end    
        % Assign strings to each sub_rock
        %create struct to store string and values
        ROCK = struct;
        for ii = 1 : size(rock_code,1)
            ROCK = struct(str_rock{1,ii},sub_rock{1,ii});
        end

But there is only the name and value of the last rock (i.e. ROCK53) in this structure, so, is there any way to achieve this struct like using for loop or other methods, thanks！

[Stephen23]

If you have any choice on the data design, then the best solution is to avoid forcing meta-data into fieldnames and simply use to basic arrays:

data = {1x13,2x13,2x13,  .. etc}
rock = [   0,  44,  50,51,52,53]

This makes processing the (meta-)data simpler and more efficient.

[Chao Zhang]

Thanks!

Answer 1

[Jonas]

use

for ii = 1 : size(rock_code,1)
    ROCK.(str_rock{ii}) = sub_rock{1,ii};
end

at the end if sub_rock cell entries are the values for the fields

Answer 2

[Jan]

str_rock = sprintfc('ROCK%d', rock_code);   % Undocumented
ROCK     = cell2struct(str_rock(:), sub_rock(:));

[Chao Zhang]

Thank you