Re: Writing array in tree again
Tadeusz Pytlos (pytlos@fizwe5.fic.uni.lodz.pl)
Mon, 23 Mar 1998 12:32:18 +0100 (CET)
Hello Pasha,
Thank you for your reply. I placed wrong also the initialisation
of indexes. It should be
On Sun, 22 Mar 1998, Pasha Murat wrote
>
> I modified your macro so it works properly now :
> ----------------------------------------------
> {
> gROOT->Reset();
> Float_t adc[16];
Int_t i,j;
> TFile *file=new TFile("adc.root","RECREATE");
> TTree *tree=new TTree("tree","Testing still");
> tree->Branch("adc",&adc,"adc[16]/F");
> for(j=0;j<100;j++) {
> for(i=0;i<16;i++) adc[i]=i;
> tree->Fill();
> }
> tree->Write();
> tree->Print();
> file->Close();
> }
> ---------------------------------------------
> Note that tree->Draw("adc") is equivalent to tree->Draw("adc[0]")
Now filling of array is OK, but it's still something what I don't
understand. I this case tree->Draw("adc") is the same as
tree->Draw("adc[0]), but in the case of the array converted from hbooks
(I meam row wise ntuples) when I type tree-Draw("adc") I see whole
array, not only adc[0]. What is a reason of this descrepancy?
Best wishes,
Tadeusz
Tadeusz Pytlos
pytlos@fizwe5.fic.uni.lodz.pl
Lodz, Poland