store data after WHILE loop

Question

Nadia Numa 2021-4-5

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/793372-store-data-after-while-loop

评论： darova 2021-4-6

Hello.

I need some help to store values in MATLAB using the following code:

for n = 1:some number
    iter = 0;
    while % condition
        iter = iter + 1 ;
        for k = 1:9
            % call the integrator 9 times
            [t,s] = ode113(@(t,y) eqns, [0 t{k}], X{k}, options);
            % X{k} contains 9 initial conditions where each has 6 values
            x{k} = s(:,1:6)
            % x{k} = stores each arc from integration
            x = 1x9 cell array where each cell is #rowsx6
        end
    end
    state(n,:) = x;
end

The issue I am having is that state does not have all n values of x. For example, if n = 2, state is size 2x9 BUT only the x values for n = 2 is stored; nothing is saved for n = 1. I also tried: state{n}(iter,:) inside the while loop and it also only stores the x data from the last iteration. It appears that the variable state is being overwritten.

Can someone please point me in the right direction? Thank you.