reading an array from a tree

From: <Chiara.Zampolli_at_bo.infn.it>
Date: Tue, 3 Oct 2006 19:08:01 +0200

Dear rooters,

   after having created a TTree with a 2-dimentional array, I am not able to retrieve the data I have stored... In the attached file you can find the macro I use to write the array in the tree, and then the tree in the file. Then, in order to retrieve it, I tried in a way similar to the ione used in the case of simple "elements":

root [1] TFile *file = new TFile("outArrayS.root","READ")
root [2] TTree *tree = (TTree*)file->Get("T")
root [3] Short_t a[1500]
root [4] tree->SetBranchAddress("a",&a)
root [5] tree->GetEntry(0)

but then, the objects I read are different from those I expected. For example, the 366th entry of array a should be (I think...) equal to 8 (the value of bincontent[367] in the macro).

Could you help me in understanding what I am doing wrong? Thanks a lot.
Best Regards,

   chiara

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Received on Tue Oct 03 2006 - 19:10:36 MEST