Asked by aditi
on 19 Sep 2013

I have to fit a polynomial

F(t)= 2F[e^(t/tr1) + e^ (-t/tr2)]^-1

where I have to find parameters tr1 and tr2

please help me in buiding code for it

*No products are associated with this question.*

Answer by Walter Roberson
on 19 Sep 2013

Accepted answer

That is not a polynomial. Polynomials only have their variables as basic terms with non-negative integer powers. If you have e^x where x is one of the variables then the expression is never a polynomial.

You appear to have F on both the left and right. Is that intended to be a recursive definition? If so then is the expression

F(t) = 2 * 1 / F(exp(t/tr1) + exp(-t/tr2))

or is it

F(t) = 2 * F[1 / (exp(t/tr1) + exp(-t/tr2)))

Either one is going to be non-trivial to find the expanded form, and there is a good chance that both tr1 and tr2 found would be complex.

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

Learn moreOpportunities for recent engineering grads.

Apply Today
## 0 Comments