How do I put the code below into one big loop so I do not have to copy and paste no more?

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Damian Sztangierski 2019-1-4

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https://ww2.mathworks.cn/matlabcentral/answers/438268-how-do-i-put-the-code-below-into-one-big-loop-so-i-do-not-have-to-copy-and-paste-no-more

评论： Damian Sztangierski 2019-1-4

h = 0.01;

A = 8000/11;

T(1)=80;

x(1)=0;

prompt = ('Guess initial Z value');

Z(1) = input(prompt);

for i=2:5

x(i) = x(i-1)+h;

T(i) = T(i-1) + h*Z(i-1)

Z(i) = Z(i-1) + h*(A*(T(i-1)-20));

end

Z1(1) = Z(1) - Z(4)

T1(1)= 80

for j=2:5

x(j) = x(j-1)+h;

T1(j) = T1(j-1) + h*Z1(j-1)

Z1(j) = Z1(j-1) + h*(A*(T1(j-1)-20));

end

Z2(1) = Z1(1) - Z1(4)

T2(1)= 80

for k=2:5

x(k) = x(k-1)+h;

T2(k) = T2(k-1) + h*Z2(k-1)

Z2(k) = Z2(k-1) + h*(A*(T2(k-1)-20));

end

Z3(1) = Z2(1) - Z2(4)

T3(1) = 80

for p=2:5

x(p) = x(p-1)+h;

T3(p) = T3(p-1) + h*Z3(p-1)

Z3(p) = Z3(p-1) + h*(A*(T3(p-1)-20));

end

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Jan 2019-1-4

You forgot to mention, what you want to change inside the loop. But actually, either for or while will solve your problem.

Damian Sztangierski 2019-1-4

Thanks for your reply, what I would like to change is the initial condition for the next iteration. Right now I have to write Z(1), Z1(1), Z2(1) and so on manually, I need a for loop that does it for me.

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Answer 1

Shane Gibbs 2019-1-4

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https://ww2.mathworks.cn/matlabcentral/answers/438268-how-do-i-put-the-code-below-into-one-big-loop-so-i-do-not-have-to-copy-and-paste-no-more#answer_355030

have you tried a while loop?

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Damian Sztangierski 2019-1-4

I have had a go but when I use a while loop, the first expression requires values that have not yet been calculated which resulted in me getting an error

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