How to build a system of iteration for multiple interrelated variables?

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Mahbubur Rahman 2016-2-24

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https://ww2.mathworks.cn/matlabcentral/answers/269844-how-to-build-a-system-of-iteration-for-multiple-interrelated-variables

评论： Mahbubur Rahman 2016-2-27

Primarily, I have 5 variables - q1,q2,q3,q4 and ts. q1,q2,q3,q4 are dependent on ts and ts is also dependent on q1,q2,q3,q4. I have the initial values of all of these q1,q2,q3,q4 and ts. Then comes t2 which I get from the above 5 variables. and Then ts(new) = ts+t2. For this new ts, the values of q1,q2,q3 and q4 again change and we get new t2, and ts is changed again....the process should go on.

How do I develop this system in Matlab? I am new in matlab, but not very novice.

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jgg 2016-2-24

Sorry, this should be V = zeros(maxiter,5); instead of 6; I miscounted your variables.

Mahbubur Rahman 2016-2-27

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Thanks a lot, jgg. I followed your coding first and eventually was able to solve it using my own ideas.

But I am looking for a new suggestion now. If you look at this code - the number of iteration n is the iteration counter but for me it is also the seconds of the system (with max time 8 sec). I need the n (or sec which can be fractional) for which ts = 1000 inside the loop.

 a = 5;
b =  22;
c = 13;
d = 4;
ts = 50+ 4*b;
stamp = zeros(1,8);
for n = 1:8
   ta = 1+(b+a)/n*c;
   ts = ta +ts; 
   b = b+1;
   a = a + b/2;
   c = c-.5;
   stamp(n) = ts; 
end 
disp(d)
disp(a)