Torsten
Posts:
1,627
Registered:
11/8/10


Re: Problem with Newton Raphson Method for Two Variables
Posted:
Jun 25, 2013 2:27 AM


>Hello, > > I have two functions, f1(x1)=a1*exp(b1*x1) >and f2(x2)=a2*exp(((x2b2)/c2)^2) >where a1, b1, a2, b2 and c2 are constants. x1 and x2 are dependent variables. >I need to solve the two functions using newton raphson's method. Can anyone help >me? > >Thanks >Shubha >> >> >>Except for trivial cases, both functions f1 and f2 don't have a zero. >>Moreover, f1 only depends on x1 and f2 only depends on x2. >>So what exactly are you trying to do with NewtonRaphson ? >> >>Best wishes >>Torsten. >>> >>> >>>Hello Torsten >>> >>>I'm trying to obtain the values for x1 and x2. Yes exactly, f1 only depends on x1 >>>and f2 on x2, while x1 and x2 are dependent on each other. Since the two >>>functions are nonlinear, I use NR method to optimize until a certain tolerance limit. >>> >>>Shubha
Hello Shubha,
it's stiill not clear to me what you are trying to do.
You write: "I'm trying to obtain the values for x1 and x2." What values ? What should these values satisfy ? Should they satisfy f1(x1)=0 and f2(x2)=0 ?
You write: "x1 and x2 are dependent on each other." How ? Can you give the function how they depend on each other ?
Best wishes Torsten.

