Hi daniel,
I suggest to read the tutorials tree0.C, tree1.C, tree2.C, tree3.C
With your example, you can do
TLeaf *l_phioffset = t->GetLeaf(("phioffset");
l_phioffset->GetBranch()->GetEntry(5); //to read entry 5
double phioffset = l_phioffset->GetValue();
Rene Brun
On Wed, 27 Nov 2002, Daniel Holmes wrote:
> Maybe someone knows the answer to this:
>
> I have a tree (*t) with a variable "phioffset" in it.
>
> i can do:
> t->Draw("phioffset"); //fine, plots a 1Dhisto of the phioffset entries
>
> ..now i want to be able to read out the actual entry values so i do:
> TBranch* b_phioffset=t->GetBranch("phioffset");
> b_phioffset->GetEntries(); //fine,returns the number of entries i expected
> b_phioffset->GetEntry(5);
>
> ..this returns :(Int_t)4 ..as does every other entry value..
> i know that not all of the entries are 4 .. so this is wrong?? ..so how do
> i read out their values?? I have other similar variables which also
> return just one integer for all entries.
>
> any ideas anyone??
>
>
>
This archive was generated by hypermail 2b29 : Sat Jan 04 2003 - 23:51:21 MET