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The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

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This reverts commit baf092324e6e2a9301daff36a780cd064b232c2d. We can either merge this as-is if the tests pass, or if they don't I'll close this PR without merging and open a GitHub issue about...

### Check duplicate issues. - [X] Checked for duplicates ### Description Calling `GetNFiles()` on the object returned by `Define` gives an incorrect value. The underlying issue is the fact that...

bug
in:RDataFrame

### Explain what you would like to see improved and how. Taking as an example ![image](https://github.com/root-project/root/assets/15638895/8fe5f2bc-0fee-4290-9487-7ff78eeee57a) From https://github.com/root-project/root/actions/runs/9201095928/job/25318040512 . The label of the build says the build type should be...

improvement

# This Pull request: This PR defines a new method `SetElement()` that allows to efficiently set matrix elements. ## Checklist: - [x] tested changes locally - [x] updated the docs...

1. Move all JS/CSS files to `js/mva/` folder which can be accessed via `/static/mva/` URL from Jupyter Notebook. This allows to use JsMVA code directly from ROOT without need to...

in:TMVA
in:WebGui

- [X] Checked for duplicates (checked with @pcanal ) ### Describe the bug Reproducer: ```cpp #include int main() { { // write data out // in the main tree, "x"...

bug
priority:critical
in:TTree

As per https://github.com/root-project/root/blob/a05d4beded1481a86a65e450826352eb528b03e7/interpreter/CMakeLists.txt#L51 we explicitly disable the llvm threading support. That leaves us on a quite untested code especially with the ORCV2 infrastructure which makes use of asynchronous compilation.

bug

Reformulation of https://github.com/root-project/root/pull/12480 --- Both Foo and Foo have the same typeid. Before this commit, TClass::GetClass(typeid(Foo)) would return whatever was registered last. This is not "stable"; it depends on which...

- [X] Checked for duplicates ### Describe the bug After creating a new TCanvas with Pyroot, moving the cursor over the TCanvas window displays the Windows wait-cursor, and clicking the...

bug