Re: [Gnuplot-info] Fitting and inverse function

[Hans-Bernhard B. <HBB...@t-...>]

On 10.04.2013 19:46, Theo wrote:
> Now, I now would like to know what is x if y = f(x) = 0.5 and place it
> as a label. The problem is that the above function can not be simply
> rewritten as inverse function x = g(y)
>
> At least as an approximation, how could I extract x?
> Can I use the fitting capability of gnuplot to do that? I don't see how
> to do it. Any ideas?

This might work (didn't try):

   fit f(x0,T1,T2,T3,R1,R2,R3) '-' via x0
     0.5
   E