Problem in using the "While" loop function

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Amr Sadek 2014-9-18

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编辑： Yona 2014-9-22

Hello, I have a function, say x=x(t) where x(t=0)=xo and x(t=1)=x(t=0)-fun(t), and x(t=2)=x(t=1)-fun(t), and so on. I want to make a loop function to calculate x(t) till x(t)=0. How can I do that?

Thank you.

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Rick Rosson 2014-9-22

Is the time domain continuous or discrete?
If discrete, what is the time increment?

Amr Sadek 2014-9-22

The time domain is discrete with increment 1.

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Yona 2014-9-22

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编辑：Yona 2014-9-22

在 MATLAB Online 中打开

you need to define all variables.

n(1)=n0;
while 1
  if n(end) <=0
    break;
  end
  n(end+1)=n(end)-S*exp(-E/(k*t));
end

matlab don't like that the length of n change, so you get a warning but it will run. after this, you will have in n all data from t=0 until t: n(t)<=0.