why this loop is not working? Actually p_j value is not changing why?

Question

RAJKUMAR SAHA 2023-3-5

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1923265-why-this-loop-is-not-working-actually-p_j-value-is-not-changing-why

编辑： VBBV 2023-3-8

n = input('please enter number of strips :');

for i = 1:n

for j = i

p_i = 0

p_j = p_i + D/(2*n)

epsilon_ci = (epsilon_max/xu)*(xu-p_j)

sigma_ci = 0.45*fc*[2*(epsilon_ci/0.002)-(epsilon_ci/0.002)^2]

p_i == p_j;

end

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Dyuman Joshi 2023-3-5

编辑：Dyuman Joshi 2023-3-5

"why this loop is not working?"

It is working.

"Actually p_j value is not changing why?"

Because you are over-writing p_j with every iteration.

It is difficult to make any suggestions as it is not clear what you are trying to do. Format your code properly, mention values of variables and specify what you want to do with this code.

Walter Roberson 2023-3-5

在 MATLAB Online 中打开

p_i == p_j;

That is not an assignment statement

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Answer 1

Pritesh Shah 2023-3-5

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1923265-why-this-loop-is-not-working-actually-p_j-value-is-not-changing-why#answer_1185465

Instead of p_j write p(j)

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Answer 2

VBBV 2023-3-8

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1923265-why-this-loop-is-not-working-actually-p_j-value-is-not-changing-why#answer_1188260

编辑：VBBV 2023-3-8

在 MATLAB Online 中打开

n = 10;% e.g. input number  
epsilon_ci = 0.001;
epsilon_max = 0.01;
xu = 2; 
fc = 100;
D = 1.1;
p_i = 0; %outside for loop
for i = 1:n
    p_j(i) = p_i + D/(2*n);
    epsilon_ci = (epsilon_max/xu)*(xu-p_j(i));
    sigma_ci = 0.45*fc*(2*(epsilon_ci/0.002)-(epsilon_ci/0.002)^2);
    p_i = p_j(i);  % assign new p_i
end
p_j
p_j = 1×10
    0.0550    0.1100    0.1650    0.2200    0.2750    0.3300    0.3850    0.4400    0.4950    0.5500