Re: [ROOT] Fitting few poynomials in the ranges

From: Tomasz Bold (bold@fatcat.ftj.agh.edu.pl)
Date: Wed Apr 21 2004 - 15:48:16 MEST


Dear Rene,
	I did not depict clearly my problem.
Apart from smooting and interpolating by splines I need to save the
function code in let's say C code to be usable by other C++ (or C)
programs having nothing to do with ROOT.

In other words.
Can I save cubic splines in the form of C function?


Best regards,
	Tomasz


--------------------------------------
Tomasz Bold
mail me:
bold@ftj.agh.edu.pl,
Tomasz.Bold@cern.ch
Tomasz.Bold@desy.de
or call:
+48 12 617 4729 (AGH)
+48 12 662 8023 (IFJ)
-------------------------------------

On Tue, 20 Apr 2004, Rene Brun wrote:

> Tomasz,
>
> The SMOOTH command in PAW was smoothing histograms. The equivalent function
> in ROOT is provided by TH1::Smooth
>
> You can also use cubic and quintic splines. See classes TSpline3, TSline5
> see $ROOTSYS/tutorials/splines.C
>
> Rene Brun
>
> Tomasz Bold wrote:
> >
> > Dear *,
> >         I am looking for replacement of smooth functionality present in
> > PAW. I figured out that fiting the plynomials of
> > degree, let's say 2 to the histogram in consecutive ranges may be OK.
> > Saving fit parameters as a definition of soothed function would work for
> > me.
> >
> > Not surprisingly the pieces does not comprise continous curve.
> >
> > Any idea how to deal with the problem. Is my aproach correct?
> >
> > Is there methods to fit Csplines in ROOT.
> >
> > Best regards,
> >         Tomasz
> >
> > --------------------------------------
> > Tomasz Bold
> > mail me:
> > bold@ftj.agh.edu.pl,
> > Tomasz.Bold@cern.ch
> > Tomasz.Bold@desy.de
> > or call:
> > +48 12 617 4729 (AGH)
> > +48 12 662 8023 (IFJ)
> > -------------------------------------
>
>



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