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> From: "William Love" <love@bnl.gov>
> To: "roottalk" <roottalk@hpsalo.cern.ch>
> Subject: Trying to fill a TProfile from a TTree
> Date: Fri, 8 Dec 2000 15:55:49 -0500
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> Rooting squad
> I don't seem to make contact in a macro between a defined TProfile and
> the TProfile output of a TTree->Draw. It works from the CINT command
> line but not from the following Macro. What am I doing wrong?
> Bill Love
>
> void Profile98ExB(const Char_t * filename="R1243037Ev98ExB.root") {
> char selection[200];
> c1 = new TCanvas("c1","Profile",200,10,700,500);
> TProfile *h1 = new TProfile("h1","dx vs row ExB
> Corrected",45,0.5,45.5,-2.5,2.5,"");
> // open the root input file.
> TString file("/star/rcf/scratch/love/roots/");
> file += filename;
> cout << "Read file "<< file << endl;
> TFile f(file->Data());
> TTree *laser = (TTree*)f.Get("laser"); //Req'd by standard C++
> // Int_t entr = laser->GetEntries();
> // laser->SetEstimate(entr);
> sprintf(selection,"fHits.ftknfit>25");
>
>
laser->Draw("fHits.fdx*sign(ftkinvp):fHits.frow%100>>h1",selection,"prof");
>
> }
>
>
>
>
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