MATLAB: How to compare each content of string which is of type double (matrix) in if loop recursively

Question

Hello Friends,

I have the following code:

   P = [1 , 0, 2];
  AB = [1, 2, 3];
  CD = [4, 5, 6];
  EF = [7, 8, 9];
M = {[AB], [CD], [EF]};
for i=1:length(M)
    P1 = P(M{i}~=0); 
    t = M{i};
    M2 = t(M{i}~=0);
    if ~any(strcmp(M, AB))
        f = f(AB);
    elseif ~any(strcmp(M, CD))
        f = f(CD);
    elseif ~any(strcmp(M, EF))
        f = f(EF);  
    end
end

I am trying to run for loop for each i . The problem is if loop. The loop iterates only the 1st if statement for AB; it does not go to elseif statement for CD and EF. I realize the problem could be the way I am using strcmp, but then, I do not know how to do it. Here all matrices/functions are taken just for illustration purpose. They could be anything.

I will appreciate any advice!

%% Below I have given the modified code after Guillaume's suggestion. Please see code below for actual problem.

Answer 1

You are making this far too complicated. Trying to detect which matrix is being processed in each loop iteration is totally unnecessary: by using a loop this is already specified! Basically you are tying to do everything twice, and this is causing lots of confusion. Try this:

P = [1, 0, 2];
AB = [1, 2, 3];
CD = [4, 5, 6];
EF = [7, 8, 9];
%


fun = @(a,b)sum(plus(a,b)); % define any function here...
%
C = {AB, CD, EF};
out = cell(size(C));
%
for k = 1:numel(C)
  mat = C{k};
  idx = mat~=0 & ~isnan(mat); % define your index conditions here
  out{k} = fun(P(idx),mat(idx));
end

which defines this out cell array:

>> out{:}
ans =
     9
ans =
    18
ans =
    27