Re: [Gnuplot-info] fitting in gnuplot

[<HBB...@t-...>]

Morten Huse wrote:

> Is there a way to set up restrictions for the variables used when fitting a 
> function to a data set?

You have to transform a full-range fit parameter into a number that 
obeys the range requirement, e.g.

> f(x)=a*x+b
> fit f(x) 'example.txt' u 2:1 via a,b
> 
> but variable b must be between 1 and 10 for example

could be rewritten as

    limit(x,lower,upper)=lower+(upper-lower)/pi*atan(x)
    f(x)= a*x+limit(b,1,10)