MathGroup Archive 2000

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: NonlinearRegression


no, because NonlinearRegression[] use *unconstrained* nonlinear
optimization methods. Giving a range for x would turn the
problem into a constrained optimization problem and
Mathematica has no solver for it :-)


David Pires wrote:
> I want to fit my data with a function such as:
> f(x)=Sqrt(a-b*x), where a and b are the parameters I want to adjust and x
> is the variable. The problem is that there is only a given range of x for
> that f(x) has real values. When I use the NonlinearRegression (or
> NonlinearFit) command, Mathematica gives error messages and aborts the
> fitting process.
> I'd like to know if someone knows how to set the range of x when using
> that command.
> Thanks.

  • Prev by Date: Re: Graphics problem
  • Next by Date: Re: Graphics problem
  • Previous by thread: NonlinearRegression
  • Next by thread: Re: NonlinearRegression