Re: [ROOT] Compress in TClones Array

From: Haitao Liu (liuht@particle.phys.ethz.ch)
Date: Tue Nov 21 2000 - 14:05:50 MET


Hi,

I have find the problem with TClonesArray, the problem is that I can not use 
TObjString. in splict mode. While in user guide I know that TString can not 
be used, it does not say I can not use TObjString. Further more, if I use 
TClonesArray::Delete instead of  TClonesArray::Clear, I get segmantation 
fault.

Another question is that can we use TTree in update mode? That mean we read 
the TTree from a TFile, add a branch, modify some leaves and write it back. 
Of course we can read the old TTree and write a new TTree, but for large 
files it will be both space and time consuming.


Thanks with regards                                        Haitao



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