tmva-branch-adder

A quick wrapper to add a TMVA classifier response to a TTree. Ideally without boilerplate code - after all, the xml file knows about the input variables.

Not heavily debugged, but feel free to try it.

quick usage

cd src
make
./main rootfile-with-tree.root name-of-tree path-to.xml output-rootfile.root

or specify the output branch name

./main rootfile-with-tree.root name-of-tree path-to.xml output-rootfile.root response-branchname

advanced usages

Be sure you have ROOT set up. Usually by sourcing the right thisroot.sh file.

installation (Makefile)

The make target install should install the tmva-branch-adder, as an executable binary and a shared library with C++ header in the standard directories (read the Makefile if you want to know more, the install target should be human readable). You can also specify the PREFIX variable:

PREFIX=$(HOME)/.local make install

installation (CMake)

I'm putting more effort on the Makefile approach (as then I also don't require you to have CMake). But as you might want to include the tmva-branch-adder in your CMake project, it might have advantages for you to use CMake. (Or you might have other reasons to favour CMake as well.)

mkdir -p build
cd build
cmake .. -G Ninja -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_INSTALL_PREFIX=${HOME}/.local -DCMAKE_RULE_MESSAGES:BOOL=OFF -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON
cmake --build . --clean-first --target install

I usually recommend out-of-source build, but in source build should work as well. Most of the CMake settings I provide above are just my personal taste, feel free to omit or adjust.

IWYU

The CMake build will try to run include-what-you-use if it is available. This can be switched off by invalidating the iwyu_path CMake variable. The most beginner friendly way to do that is probably ccmake:

mkdir -p build
cd build
cmake <path_to_source> <options as above>

then

• go to the line with iwyu_path
• press [enter] to edit the line
• [space][backspace] to actually edit the line
• make it empty [enter] to save the change
• [c], [g] to apply the configuration

Reversely, running CMake with -Diwyu_path=<path_to_iwyu_binary> should activate include-what-you-use even if it is not found in the $PATH.

examples

If a command line program is not what you need, please check the C++ program in the examples directory for a rough sketch how to include the tmva-branch-adder in a C++ program.

Dependencies

• CERN ROOT and its dependencies
• zsh tab completion requires root-ls-tree

Organisatorial matters

Acknowledgements

Thanks for input from (cern, slack, mattermost, github, stackoverflow, robust-irc, root-forum usernames):

• ttekampe
• @ibab
• burney
• @pcanal
• fkruse
• sur5r
• @petitcactusorange
• fredi
• lisovsky
• mvesteri
• rquaglia
• ndawe
• 0xb1ns

TODO / Wishlist

• provide/test pyroot access
• clang-format (+test)
• IWYU test

legacy ROOT/GCC

Since 0.4 (and on master at the time of writing), tmva-branch-adder should build w/ and w/o c++11, as well as with root5 and root6, and with c++11 also when using gcc 4.8 (not fully c++11 compatible). when using the Makefile. The CMake setup depends on modern CMake exported from ROOT.

Contributing

I would be happy if someone can review/test the python interface, suggest an interface that fits users better, maybe even add a numpy interface (well, that might as well be an independent project on its own). For those, feel invited to submit pull requests or issues, such that even if you only have a suggestion and I cannot implement it, other visitors can pick up your suggestion to make the world a little bit better.

License

The project is licensed under GPL. If this is an issue for you (you want to include it / link against it / reuse parts of it in your project and use a LGPL, MIT, Apache, BSD, whathaveyou license), you can get in contact with me to discuss double-licensing the tmva-branch-adder (e.g. for an inclusion in the "upstream project" TMVA).