Hi Alexander, It looks like you have generated an analysis function via TTree::MakeClass or MakeSelector. The maximum dimension for [count] in the generated header file is based on the maximum value of count for the file used to generate the code. Simply extend this dimension when using it with a TChain such that the maximum value of [count] can be digested. Rene Brun On Wed, 3 Sep 2003, Alexander Bürger wrote: > Hi, > > to put my Events into a Tree I have a class similar to the following: > > class TEvent { > int count; > float *time; //[count]; > }; > > I like this, because in the tree viewer I can click and I get a nice time > spectrum. Unfortunately, I made some mistake in memory allocation so that > when I used TChain to chain several files, I did not get spectra, but only > segfaults, while with a single TFile it was working. > > Before fixing the problem I tried to use a class like > > class TEvent { > int count; > std::vector<float> time; //[count] > }; > > to circumvent manual memory allocation and also to avoid re-allocation of > the array for each event in reading from the tree. But I did not get this > to work in the tree viewer: the time spectrum just showed zeroes. > > How can I use the vector<> in a way compatible with the tree viewer? > > Best wishes, and thanks for your help, > > Alexander > >
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