using end value in next iteration

Question

harley 2013-9-2

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/86144-using-end-value-in-next-iteration

want the Vo at the end of each loop to be used in the start of the next iteration, just can't get to work, I display Vn but its not updating from iteration to iteration. Any thoughts?

    %
    Voo = [30 15 13 10];   %
    while true
    %
    Vo = Voo;
    %
    f1 = 64 / Re1;
    f2 = 64 / Re2;
    f3 = 64 / Re3;
    f4 = 64 / Re4;
    X = [matrix]
    %
    Y = [matrix]
    Vn = X\Y;
    disp(Vn)
    %
    for i = 1:4
        Va(i) = (alpha * Vn(i)) + ((1-alpha) * Vo(i));
        Vo(i) = Va(i);
        if (abs(Va(1)-Vn(1)))<1e-3 
       break;
        end
    end

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Answer 1

Azzi Abdelmalek 2013-9-2

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/86144-using-end-value-in-next-iteration#answer_95645

编辑：Azzi Abdelmalek 2013-9-2

在 MATLAB Online 中打开

Voo = [30 15 13 10]; 
Vo=Voo
while ~all([Va==Vo,Vo==Vn]) (needs to be approx equal to)
  Vo=Voo
  Re1 = (D(1).*Vo(1)) / nu;
  Re2 = (D(2).*Vo(2)) / nu;
  Re3 = (D(3).*Vo(3)) / nu;
  Re4 = (D(4).*Vo(4)) / nu;
  A = [Matrix];
  b = [Matrix];
  Vn = A\b;% solves four unknowns at A\b % (1 col, 4 rows)
  for i = 1:4
      Va(i) = (alpha * Vn(i)) + ((1-alpha) * Vo(i)); %(1 col, 4 rows)
      Vo(i) = Va(i); %Used as Vo for each in next iteration. (1 col, 4 rows)
  end
end