How to keep an element fixed until it fits a condition?

for ii=1:4

    deneme{ii,:}= vericell(class==ii,:);
        for j = 4:14
             deneme{ii}{:,j};
             meanres(ii,j) = mean (deneme{ii}{:,j});
             stdres(ii,j) = std(deneme{ii}{:,j});
             uscalc(ii,j) = (predictioncolumn(j) - meanres(ii,j)) ^2 / (2* (stdres(ii,j)^2));
             meancalc(ii,j) =  1/(sqrt(2*pi)* stdres(ii,j)) * (2.71^(uscalc(ii,j))) ;
             bolumler{ii,:} = sum(veri.Class==ii)/ length(veri.Class);
             likelihood(ii,j) = meancalc(ii,j) * bolumler{ii,:};
end
end

I want ii to stay as 1 while j keeps iterating until it reaches it's limit (14). And when it happens I want ii to be 2 and j to iterate from 4 to 14.

Answer 1

[njj1]

Can you clean up the code a little? It's not clear where the loops begin and end... A couple more questions/comments.

1) How can j be greater than 14, since the loop only has j moving from 4 to 14?

2) Try not to use "length"; instead use size(x,dim) or numel(x).

3) If you want to accumulate the multiplication of meancalc(ii,j)*bolumler{ii,:}, then you could use the variable likelihood in the multiplication (i.e., likelihood(ii,j) = likelihood(ii,j-1)*meancalc(ii,j)).

[Sukru Yavuz]

I am sorry I forgot to delete that. That's what I am trying to figure out how can I write that like j = 4, i = 1, I want i to stay as 1 and j to continue until 14, when j reaches 14, i want i to be 2 and do the same for j from 4 to 14. The "length" is working properly right now it gives me the results i want. (I am editing my question now)

[njj1]

Seems to me like your code should work as it stands. What exactly is going wrong?

[Sukru Yavuz]

I am really confused I am sorry. I need the multiplication of meancalc(ii,j) like: meancalc(1,4) * meancalc(1,5) * meancalc(1,6)... * meancalc(1,14) * bolumler{ii,:} I need that result.

[njj1]

Right, so try this:

for ii=1:4
  deneme{ii,:}= vericell(class==ii,:);
  for j = 4:14
           deneme{ii}{:,j};
           meanres(ii,j) = mean (deneme{ii}{:,j});
           stdres(ii,j) = std(deneme{ii}{:,j});
           uscalc(ii,j) = (predictioncolumn(j) - meanres(ii,j)) ^2 / (2* (stdres(ii,j)^2));
           meancalc(ii,j) =  1/(sqrt(2*pi)* stdres(ii,j)) * (2.71^(uscalc(ii,j))) ;
           bolumler{ii,:} = sum(veri.Class==ii)/ length(veri.Class);
           likelihood(ii,j) = meancalc(ii,j) * bolumler{ii,:};
  end
  what_you_care_about = prod(meancalc(ii,4:14))*bolumler{ii,:};
end

Answer 2

[Star Strider]

The code you posted should do that.

The outer ‘ii’ loop begins at 1. The inner ‘j’ loop will iterate from 4 to 14 for each value of the outer loop ‘ii’ variable. Then ‘ii’ will increase by 1, the inner loop iterates, and the process continues until ‘ii’ is 4 and the final iteration of ‘j’ is 14.

Also, the code you posted is missing an end for the ‘ii’ loop. I assume you simply forgot to copy it.

[Sukru Yavuz]

Yes, sorry i forgot to copy that. I want ii to stay as 1 when j goes from 4 to 14. And when j finishes that, I want ii to increase to 2 and then j goes from 4 to 14 again.

[Star Strider]

Your code as you wrote it will do what you want.

This will allow you to see what your indices are doing:

for ii = 1:4
    for j = 4:14
        fprintf('ii = %2d\tj = %2d\n', ii,j)
    end
end
fprintf('\n\n')

[Sukru Yavuz]

ii = 1 j = 4

ii = 1 j = 5

ii = 1 j = 6 ii = 1 j = 7

ii = 1 j = 8

ii = 1 j = 9

ii = 1 j = 10

ii = 1 j = 11

ii = 1 j = 12

ii = 1 j = 13

ii = 1 j = 14

The result is looking like this, thank you. Sorry about my confusion, my question is I want meancalc(1,4:14) to be multiplied like meancalc(ii,4) * meancalc(ii,5) ... meancalc(ii,14)