Comments (20)
mmikhasenko
commented on May 16, 2024
1
thanks for the quick reply
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aminnj
commented on May 16, 2024
1
That output reminds me of this useful method in ROOT:
root [0] TDirectory::Class()->GetStreamerInfo()->ls()
StreamerInfo for class: TDirectory, version=5, checksum=0x1e9b6f70
TNamed BASE offset= 0 type=67 The basis for a named object (name, title)
TObject* fMother offset= 64 type=64 pointer to mother of the directory
TList* fList offset= 72 type=64 List of objects in memory
TUUID fUUID offset= 80 type=62 Unique identifier
i= 0, TNamed type= 67, offset= 0, len=1, method=0
i= 1, fMother type= 64, offset= 64, len=1, method=0
i= 2, fList type= 64, offset= 72, len=1, method=0
i= 3, fUUID type= 62, offset= 80, len=1, method=0root [1] TH1::Class()->GetStreamerInfo()->ls()
StreamerInfo for class: TH1, version=8, checksum=0x1c3740c4
TNamed BASE offset= 0 type=67 The basis for a named object (name, title)
TAttLine BASE offset= 64 type= 0 Line attributes
TAttFill BASE offset= 80 type= 0 Fill area attributes
TAttMarker BASE offset= 96 type= 0 Marker attributes
int fNcells offset=112 type= 3 number of bins(1D), cells (2D) +U/Overflows
TAxis fXaxis offset=120 type=61 X axis descriptor
TAxis fYaxis offset=336 type=61 Y axis descriptor
TAxis fZaxis offset=552 type=61 Z axis descriptor
short fBarOffset offset=768 type= 2 (1000*offset) for bar charts or legos
short fBarWidth offset=770 type= 2 (1000*width) for bar charts or legos
double fEntries offset=776 type= 8 Number of entries
double fTsumw offset=784 type= 8 Total Sum of weights
double fTsumw2 offset=792 type= 8 Total Sum of squares of weights
double fTsumwx offset=800 type= 8 Total Sum of weight*X
double fTsumwx2 offset=808 type= 8 Total Sum of weight*X*X
double fMaximum offset=816 type= 8 Maximum value for plotting
double fMinimum offset=824 type= 8 Minimum value for plotting
double fNormFactor offset=832 type= 8 Normalization factor
TArrayD fContour offset=840 type=62 Array to display contour levels
TArrayD fSumw2 offset=864 type=62 Array of sum of squares of weights
TString fOption offset=888 type=65 histogram options
TList* fFunctions offset=912 type=63 ->Pointer to list of functions (fits and user)
int fBufferSize offset=920 type= 6 fBuffer size
double* fBuffer offset=928 type=48 [fBufferSize] entry buffer
TH1::EBinErrorOpt fBinStatErrOpt offset=968 type= 3 option for bin statistical errors
TH1::EStatOverflows fStatOverflows offset=972 type= 3 per object flag to use under/overflows in statistics
i= 0, TNamed type= 67, offset= 0, len=1, method=0
i= 1, TAttLine type= 0, offset= 64, len=1, method=0
i= 2, TAttFill type= 0, offset= 80, len=1, method=0
i= 3, TAttMarker type= 0, offset= 96, len=1, method=0
i= 4, fNcells type= 3, offset=112, len=1, method=0
i= 5, fXaxis type= 61, offset=120, len=1, method=0
i= 6, fYaxis type= 61, offset=336, len=1, method=0
i= 7, fZaxis type= 61, offset=552, len=1, method=0
i= 8, fBarOffset type= 22, offset=768, len=2, method=0 [optimized]
i= 9, fEntries type= 28, offset=776, len=8, method=0 [optimized]
i=10, fContour type= 62, offset=840, len=1, method=0
i=11, fSumw2 type= 62, offset=864, len=1, method=0
i=12, fOption type= 65, offset=888, len=1, method=0
i=13, fFunctions type= 63, offset=912, len=1, method=0
i=14, fBufferSize type= 6, offset=920, len=1, method=140375097856088
i=15, fBuffer type= 48, offset=928, len=1, method=920
i=16, fBinStatErrOpt type= 23, offset=968, len=2, method=0 [optimized]for anything inheriting from TObject. Maybe it's already common knowledge 🤷 but I figured I'd write this somewhere for posterity.
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tamasgal
commented on May 16, 2024
Yep, thanks for the issue and the reminder! That’s the best way to keep track of all the tasks.
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mmikhasenko
commented on May 16, 2024
Not sure if it is the same issue, but I am getting
ERROR: UndefVarError: TDirectory not defined error when trying to access a folder in the root file
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tamasgal
commented on May 16, 2024
Ah yes indeed, the TDirectory is still experimental (not implemented 🙈 ) I really hope to find some time the next weeks to work on UnROOT.
I now also have some ROOT files from another experiment which has TDirectorys and NTuples, so chances are that I have to spend time 😆
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mmikhasenko
commented on May 16, 2024
Oh,
on the README page, you have an example
julia> array(f, "KM3NET_EVENT/KM3NET_EVENT/triggeredHits"; raw=true)aren't KM3NET_EVENT a directory?
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tamasgal
commented on May 16, 2024
```julia julia> array(f, "KM3NET_EVENT/KM3NET_EVENT/triggeredHits"; raw=true)aren't KM3NET_EVENT a directory?
No, the first level is a TTree and the second level is a TBranchElement (see below).
I'll try to figure out the TDirectory, it should not be that hard...
julia> using UnROOT
julia> f = ROOTFile("test/samples/km3net_online.root")
ROOTFile("test/samples/km3net_online.root") with 10 entries and 54 streamers.
julia> f["KM3NET_EVENT"]
UnROOT.TTree
fName: String "KM3NET_EVENT"
fTitle: String "km3net_event"
fLineColor: Int16 1
fLineStyle: Int16 1
fLineWidth: Int16 1
fFillColor: Int16 19
fFillStyle: Int16 1001
fMarkerColor: Int16 1
fMarkerStyle: Int16 1
fMarkerSize: Float32 1.0f0
fEntries: Int64 3
fTotBytes: Int64 5666
fZipBytes: Int64 5666
fSavedBytes: Int64 0
fFlushedBytes: Int64 0
fWeight: Float64 1.0
fTimerInterval: Int32 0
fScanField: Int32 25
fUpdate: Int32 0
fDefaultEntryOffsetLen: Int32 1000
fNClusterRange: UInt32 0x00000000
fMaxEntries: Int64 1000000000000
fMaxEntryLoop: Int64 1000000000000
fMaxVirtualSize: Int64 0
fAutoSave: Int64 -300000000
fAutoFlush: Int64 -30000000
fEstimate: Int64 1000000
fClusterRangeEnd: Array{Int64}((0,)) Int64[]
fClusterSize: Array{Int64}((0,)) Int64[]
fIOFeatures: UnROOT.ROOT_3a3a_TIOFeatures
fBranches: UnROOT.TObjArray
fLeaves: UnROOT.TObjArray
fAliases: Missing missing
fIndexValues: Array{Any}((0,))
fIndex: Array{Any}((0,))
fTreeIndex: Missing missing
fFriends: Missing missing
julia> f["KM3NET_EVENT/KM3NET_EVENT"]
UnROOT.TBranchElement_10
cursor: UnROOT.Cursor
fName: String "KM3NET_EVENT"
fTitle: String "KM3NET_EVENT"
fFillColor: Int16 0
fFillStyle: Int16 1001
fCompress: Int32 0
fBasketSize: Int32 65536
fEntryOffsetLen: Int32 1000
fWriteBasket: Int32 0
fEntryNumber: Int64 0
fIOFeatures: UnROOT.ROOT_3a3a_TIOFeatures
fOffset: Int32 0
fMaxBaskets: UInt32 0x0000000a
fSplitLevel: Int32 1
fEntries: Int64 3
fFirstEntry: Int64 0
fTotBytes: Int64 0
fZipBytes: Int64 0
fBranches: UnROOT.TObjArray
fLeaves: UnROOT.TObjArray
fBaskets: UnROOT.TObjArray
fBasketBytes: Array{Int64}((10,)) [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
fBasketEntry: Array{Int64}((10,)) [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
fBasketSeek: Array{Int64}((10,)) [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
fFileName: String ""
fClassName: String "KM3NETDAQ::JDAQEvent"
fParentName: String ""
fClonesName: String ""
fCheckSum: UInt32 0xe59f689d
fClassVersion: Int16 4
fID: Int32 -2
fType: Int32 0
fStreamerType: Int32 -1
fMaximum: Int32 0
fBranchCount: Missing missing
fBranchCount2: Missing missingfrom unroot.jl.
mmikhasenko
commented on May 16, 2024
alright, thanks
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mmikhasenko
commented on May 16, 2024
Just some encouragement (sorry, not PR): most of our files (LHCb tuples) have directories inside.
For long time already, I want to move to UnROOT, this seems to be the last obstacle ;)
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tamasgal
commented on May 16, 2024
Alright, that's a good motivation! 😆
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tamasgal
commented on May 16, 2024
@mmikhasenko do you have a small sample file for us?
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mmikhasenko
commented on May 16, 2024
Can check now. Should TDirectory work already?
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mmikhasenko
commented on May 16, 2024
Here is a simple tree with Np x 4 number of branches, stored in a directory. By changing Nev, you can adjust the size of the file.
#include "TString.h"
#include "TFile.h"
#include "TTree.h"
#include <string>
#include "stdlib.h"
int create_a_tree() {
TFile *f = new TFile("test_tree.root", "recreate");
f->mkdir("Data");
f->cd("Data");
TTree *t = new TTree("mytree", "mytree");
auto app = "EXYZ";
const uint Np = 10;
//
double v[Np][4];
for (uint n=0; n<Np; n++) {
for (uint i=0; i<4; i++) {
t->Branch(TString::Format("Particle%d_%c", n, app[i]), &v[n][i]);
}
}
const int Nev = 30000;
for (uint i=0; i <= Nev; i++) {
for (uint n=0; n<Np; n++)
for (uint i=0; i<4; i++)
v[n][i] = (rand() % 100) / 100.0;
//
t->Fill();
}
t->Write();
f->Close();
return 0;
}from unroot.jl.
mmikhasenko
commented on May 16, 2024
Just checked on the latest release and master
@v1.6 > using UnROOT
@v1.6 > f = ROOTFile(joinpath("Downloads\\test_tree.root"))
@v1.6 > f["Data"]throws
UndefVarError: TDirectory not definedfrom unroot.jl.
Moelf
commented on May 16, 2024
Tamas is just asking for a sample test file so he can work on it maybe. nothing has changed recently in this direction
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mmikhasenko
commented on May 16, 2024
Ok. is what I posted sufficient?
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tamasgal
commented on May 16, 2024
Thanks, that should be enough!
@all-contributors please add @mmikhasenko for data
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allcontributors
commented on May 16, 2024
I've put up a pull request to add @mmikhasenko! 🎉
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tamasgal
commented on May 16, 2024
Here is an excellent document describing the TDirectory: https://github.com/root-project/root/blob/master/io/doc/TFile/tdirectory.md
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tamasgal
commented on May 16, 2024
Added in #107 thanks to @aminnj
@mmikhasenko please have a look whenever you have time :)
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Related Issues (20)
- `LazyTree()` hang regression in 0.10.16
- Pre-compilation failure after upgrading to v1.9.3 HOT 6
- Performance for trees with a large number of branches HOT 13
- Fix Documentation due to their 1.0 release
- `RNTuple` reading extremely slow
- `nanoAOD_ttbar` latency HOT 26
- CI broken on nighly due to MD5.jl using SHA.jl internals
- RNTuple RC2 compatibility
- Do not manage to read a TTree with a structure of arrays of basic types HOT 17
- Cannot read empty collections from a RNTuple file HOT 1
- ConcurrencyViolationError when reading with XRootD HOT 2
- [RNTuple] Wrong offset `Index32/Index64` array when read from multiple pages HOT 7
- [RNTuple] accessing nested structs is not lazy enough HOT 1
- [WIP] 0.11.0 breaking changes items
- Re-write resources with `Base.Lockable`
- [RNTuple] OutOfMemoryError in show() HOT 2
- Reading a file with Branches and Leafs HOT 11
- [RNTuple] miss-aligned column in DAOD_TLA with RNTuple RC2 HOT 2
- xrootd doesn't handle XCache
- [RNTuple] Roadmap of writing RNTuple to disk
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