MATLAB: How to make a code with for loop for undetermined index

Question

Hi all,

I have a code in GO ontology that it build the part of tree (POT) by finding each level for each cell (which called nodes in bioinformatic) in cells array .. The code is manual( I have already know the number of levels and te data entered). I want to make this code work with undetermined number of levels and data (vector 'p' and 'c' as you will see bellow). note that the first level should be a single value ( because it should be the root level), so that from this root level we have to find level 2 , and from level 2 we have to find level 3 and so on…

so, I want the conclusion code to find the following: finding all nodes for each level and put them all in a vector ( or cells array) called levels as follows: levels=[ level1 level2 level3….leveln] and each level contain the terms it belongs to ( according to the following code)such as:

level1=['node1' 'node2' 'node3'.. etc]

part of the code is:

% this code is to find levels for the cells array 'p' and 'c' (resulted from   % previous code
  %to find the root (level 1) 
      level1_root=setdiff(p,c)
    % to find level 2
    level2=[];
    for i=1:length(p)
         a=[p(i),c(i)];
       if isequal(a(1), level1_root)
          level2=[level2 a(2)];
       else  
       end
    end
% to find level 3 
level3=[];
for j=1:length(level2)
      for i=1:length(p)
          a=[p(i),c(i)];
          if isequal(a(1), level2(j))
               level3=[level3 a(2)];
          else
            end
        end
end
% to find level4
   level4=[];
  for j=1:length(level3)
          for i=1:length(p)
              a=[p(i),c(i)];
              if strcmp(a{1}, level3{j})
                   level4=[level4 a(2)];
              else
              end
          end
  end

can I use while loop? is so, how?!

thx alot

Answer 1

save this function

function level=level_fc(p,c,level1)
level=[];
for i=1:length(p)
   a=[p(i),c(i)];
   if isequal(a(1), level1)
        level=[level a(2)];
   end
end

then call your function

level1=level1_root
for k=1:10
  level{k}=level_fc(p,c,level1)
  level1=level{k}
end