Hi,
1. Have a look at TProfile.
2. Comment in Fit function reads: "// The function returns the number of
selected entries."
3. Comment in TTree::Draw reads:
By default the temporary histogram created is called htemp.
One can retrieve a pointer to this histogram with:
TH1F *htemp = (TH1F*)gPad->GetPrimitive("htemp");
Eddy
> X-Authentication-Warning: pcroot.cern.ch: majordomo set sender to
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> Date: Tue, 20 Aug 2002 21:53:02 +0900
> From: Takefumi SORA <tak-sora@bg7.so-net.ne.jp>
> To: Roottalk <roottalk@pcroot.cern.ch>
> Subject: [ROOT] Tree Fit
> MIME-Version: 1.0
> Content-Transfer-Encoding: 7bit
>
> Hi,
>
> I have three questions.
>
> 1.
> Now I have two "Leaf".
> I want to plot them 2-dimensionally and fit by "pol1".
>
> To plot 2-dimensionally is easy.
> tree->Draw("leaf1:leaf2",cut);
>
> But I can not fit the 2-dimensional plot.
> Please tell me how to fit.
>
> 2.
> According to ROOT class reference, TTree::Fit funcition return
> "Int_t". What does the "Int_t" parameter mean.
>
> 3.
> In example
> tree->Draw("leaf1:leaf2 >> objectA")
> Must the objectA be TH class ?
>
> --
> Takefumi SORA <tak-sora@bg7.so-net.ne.jp>
>
Eddy A.J.M. Offermann
Renaissance Technologies Corp.
Route 25A, East Setauket NY 11733
e-mail: eddy@rentec.com
http://www.rentec.com
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