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histo.Integral() vs looping tree to get sumw
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1
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15
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March 31, 2025
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Reading a large ROOT TTree fills RAM
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3
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43
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March 29, 2025
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Get data from a Zombie file
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2
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12
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March 24, 2025
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Combining root files with weighting
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4
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22
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March 21, 2025
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Memory consumption with string Define() in RDataFrame (PyROOT)
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2
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20
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March 21, 2025
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Calculating cosTheta from TLotentzVector
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1
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22
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March 19, 2025
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Sum of multiple spectra of different root files
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3
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30
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March 3, 2025
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Get TestTree and TrainTree after TMVA is completed
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1
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14
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February 14, 2025
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Bug or feature in TTree::Draw()?
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19
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49
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February 25, 2025
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2D plot from interactive ROOT
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4
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40
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February 10, 2025
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String branch cannot be read from TTree
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4
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17
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January 31, 2025
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Something wrong with CopyTree
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10
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29
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January 24, 2025
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Slow performance when using multithreading with TTaskGroup
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6
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33
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January 20, 2025
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Manual schema evolution: handling change of namespace
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2
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19
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January 1, 2025
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Access and modify TTree(Delphes)
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14
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49
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December 21, 2024
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Adding a new branch such that invariant mass that not exist in DelphesTree
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3
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29
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November 30, 2024
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Merge horizontally TTrees with TBranch as key
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4
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29
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December 5, 2024
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Same TSelector for different Trees
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1
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16
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November 20, 2024
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pyROOT Branch handling/filling
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5
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30
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November 25, 2024
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Fatal in <TBufferFile::WriteFastArray>: Not enough space left in the buffer (1GB limit). 4952997 elements is greater than the max left of 956626 aborting
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2
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80
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November 22, 2024
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SetDirectory(0) for RNTuple
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5
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34
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November 13, 2024
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chain->Draw("var:chain->GetTreeNumber()")
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4
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17
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October 11, 2024
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Suspect TTree::GetEntry() causing on and off segmentation violation
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10
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40
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October 14, 2024
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TClonesArray nested within TClonesArray
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5
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20
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September 28, 2024
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How to efficiently remove zero entries from DataFrame rows
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2
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123
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September 23, 2024
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Segfault with objects clearly there, TFile not closing
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3
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22
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October 4, 2024
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Filling a TTree Branch with a variable lenght array
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6
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50
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September 3, 2024
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Getting value from the leaf
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4
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35
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September 2, 2024
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How to deal with the errors about GetEntry
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3
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35
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September 13, 2024
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Probem of defining and filling a TTree Branch with structure containing a std::vector in pyROOT
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3
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26
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September 6, 2024
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