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Matlab running out of memory on code

  1. Nov 7, 2015 #1
    1. The problem statement, all variables and given/known data
    I am trying to run code for the code below but matlab runs out of data.

    3. The attempt at a solution
    NumberOfVariables = 9;
    k=NumberOfVariables^2-NumberOfVariables+1;
    integers = 0:k-1;
    numbers = 1:k-1;
    tic
    s = combnk(integers,NumberOfVariables);
    AllAnswers = [];
    for i = 1:size(s,1)
    G=combnk(s(i,:),2);
    G = [(G(:,1)'-G(:,2)') (G(:,2)'-G(:,1)')];
    G = sort(mod(G,k));
    if (isequal(G,numbers))
    AllAnswers = [AllAnswers;s(i,:)];
    end
    end
    toc

    I am trying to find the numbers that satisfy the condition in the code. I want the first AllAnswers that do not contain zeros for NumberOfVariables = 9,10,12,14,17,20?I wrote code for the for loops, but as we all know that doesn't scale favorably in computational time and matlab crashes.
     
  2. jcsd
  3. Nov 8, 2015 #2

    jedishrfu

    Staff: Mentor

    I would try placing print statements inside the code to see how large each array is as you keep adding stuff to the all answers array.
     
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