MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

Learn moreOpportunities for recent engineering grads.

Apply Today**New to MATLAB?**

Asked by Amr Sadek
on 7 Jun 2014

Hello, How can I use the final results obtained from the first iteration of a loop function in the second iteration of the same loop? For example, let T=[100:200], and A(T0) and k are constant known values. for T=T1, I want to calculate the following: I(T1)=A(T0).* exp(T1)

A(T1)=I(T1).* k

However, for T=T2, I want to calculate:

I(T2)= A(T1).* exp(T2)

A(T2)=I(T2).*k

and,

fot T=T3,

I(T3)= A(T2).* exp(T3)....and so on.

A(T3)=I(T3) Thanks

*No products are associated with this question.*

Answer by Star Strider
on 7 Jun 2014

Accepted answer

With ** T** that large, you quickly end up with an array of

This loop will do what you want:

A0 = 3; k = 5; I(1) = A0 * exp(100); A(1) = I(1)*k; for T = 2:100 I(T)= A(T-1).* exp(T+99); A(T) = I(T)*k; end

I started the loop counter at `1` rather than `100` because otherwise your arrays are padded with `99` zeros. That takes up memory.

Amr Sadek
on 7 Jun 2014

Thank you. This is exactly what I want. I will try to apply it now on my real equations.

Star Strider
on 7 Jun 2014

My pleasure!

(The sincerest form of appreciation here on MATLAB Answers is to Accept the Answer that most closely solves your problem.)

## 0 Comments