Getting array out of for loop

Question

Swapnil Rathva 2020-2-24

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/507317-getting-array-out-of-for-loop

编辑： Jesus Sanchez 2020-2-24

Hello,

I am trying to run a for loop for fixed amount of iteration for variable n and wanna get output variables in one array so that i can have a graph.

but every time I am getting updated value out of loop and all previous values are gone.

Please help me find code that can save array instead of last partivular updated value. My code is as follows;

clc
clear
%% pre-defined variables and equations
p_in = 100;
p_out = 30000;
cr = p_out/p_in;
n = 1;
cr_stage = (p_out/p_in)^(1/n);
%% alghorithm
while cr_stage > 3.99   % cr_stage variable should not exceed 4, otherwise increment in variable n
    n(n) = n+1;
    cr_stage(n) = (p_out/p_in).^(1./n);
    if cr_stage(n) < 3.99  % when its below 4, loop breaks itself.
        break
    end
end
n_1 = 1;
n = [n_1, n];
cr_stage = cr_stage(end);
stages = numel(n);
for i = n(1):n(end)   % for loop for iteration of n times
    p_out = p_in * cr_stage  % want this variable output in array to have graph
    p_in = p_out;     % updated value of variable above given.
end

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Answer 1

Jesus Sanchez 2020-2-24

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/507317-getting-array-out-of-for-loop#answer_417176

编辑：Jesus Sanchez 2020-2-24

在 MATLAB Online 中打开

Treat p_out as a vector and you will be fine:

for i = 1:length(n)   % for loop for iteration of n times
    p_out(i) = p_in * cr_stage  % want this variable output in array to have graph
    p_in = p_out(i);     % updated value of variable above given.
end