Hi Ray,
I will add a TF1::SetFunction in the next release.
After having read back your TGraph (or TH1) object with a fitted function,
you can call graph->GetFunction("name")->SetFunction(fcn).
As you have found out, it is not possible to save in the TGraph
object the compiled function. Instead, I save an array of points
where the function has been computed in such a way that you can at least
draw the shape of the function in a new session.
Rene Brun
On Mon, 15 Oct 2001, Ray Fliller III wrote:
>
>
> I am using ROOT CVS version as of 10/12 on Linux.
>
> I want make a TF1 with a compiled function, fit a graph,
> write the graph to a file, read the graph back later, and fit with
> the function stored in the graph.
>
> After looking around, I see that the member point fFunction is
> no reset. Assuming that the compiled function in question is
> loaded every session, fFunction is of course different every time,
> so I understand not saving it. But is there a way to do the above
> operation??
>
>
>
> --
>
> RAINMAN
> "How much does a piece of gum cost Ray?"
> "About $100."
> "How much does a new car cost Ray?"
> "`Bout $100."
> "There goes working for NASA!"
>
> ==================================================================
> Ray Fliller: rfliller@bnl.gov Office Phone: (631)-344-6124
> C-A Accelerator Physics Dept. Fax: (631)-344-5954
> Building 911B
> Brookhaven National Lab
> Upton, NY 11973 Office: Room 211
>
> http://www.agsrhichome.bnl.gov/People/rfliller/
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>
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