Reiterate a function from an initial value

2022 3 18
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更新时间：2022 3 18
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Hi, Im trying to reiterate this function. I'm aware of using a for loop but im not sure how to set it up. Thanks in advance

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Davide Masiello
Davide Masiello 2022-3-18
编辑：Davide Masiello 2022-3-18
Ran in:

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Ran in:
clear,clc
dThetaS = zeros(1,10000);
dThetaS(2) = 2;
dTheta = 1;
dThetaD = 1;
Ka = 1;
idx = 2;
while abs(dThetaS(idx)-dThetaS(idx-1)) > 0.001
dThetaS(idx+1) = ((dTheta+dThetaD)/(1+Ka*dThetaS(idx)))^0.25;
idx = idx+1;
end
dThetaS = dThetaS(2:end);
dThetaS(dThetaS == 0) = [];
plot(dThetaS)

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Alexander Madsen
Alexander Madsen 2022-3-18
De = 0.234;
h = 2.6;
lambda1 = 0.2426;
lambda2 = 0.444;
T1 = 0.3088;
T2 = 0.1078;
T3 = 0.0538;
n = 3;
KA = ((pi*De*h)/(1+lambda1+lambda2))*((T1/n)+T2*(1+lambda1)+T3*(1+lambda1+lambda2))
deltaS = 2;
idx =1;
deltaS = 2;
idx =1;
while deltaS(idx+1)-deltaS(idx) > 0.001
deltaS(idx+1) = ((dphi+dphid)/(1 + KA * dphief))^(-1/2);
idx = idx +1;
end
T4 = 1/(pi*De*h*dphief)
"Index exceeds the number of array elements (1)."
Davide Masiello
Davide Masiello 2022-3-18
编辑：Davide Masiello 2022-3-18
Found a bug in my previous code, so I edited the answer.
Try to substitute the real values of dTheta, dThetaD and Ka and see if it works for you.

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