How to create a loop in matlab codes?

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Heartrin
Heartrin 2015-10-19
编辑： Thorsten 2015-10-29
i am calculating a variable theta , and i need to give this theta as a feed bak to one of the formula which i used to calculate it. how should i give a loop. i am totally new to matlab codes. please help. the calculation is,
theta = a+b-c-d, where a b c d are some formulas, in which b and c has a theta term in it. so i have to give the left side theta as feedback to b and c.
in simulink you can just pick a line from theta and connect it to b and c block. but how do i loop this with matlab codes?
please help me.

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Thorsten
Thorsten 2015-10-19
编辑：Thorsten 2015-10-19
theta = 23; % some starting value
for i = 1:10 % run 10 times, for example
a = exp(i); % sample computations for a, b, c, d
b = sin(i);
b = 10*theta
c = theta^2;
theta = a + b - c - d;
end
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Heartrin
Heartrin 2015-10-28
Hi thanks for your help. but i have a doubt what is that (i) in the sample computation of a & b in the codes you written above?
Thorsten
Thorsten 2015-10-29
编辑：Thorsten 2015-10-29
i is the loop variable that runs from 1:10, i.e., takes values 1, 2, 3, ..., 10. You can use x instead of i if you do not want to overwrite the Matlab's constant for the imaginary unit i=sqrt(-1).

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