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[feature] efficient tree building using SLIQ #11

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@zouzias zouzias commented Oct 5, 2019

Implementation of tree building process as in

Mehta M., Agrawal R., Rissanen J. (1996) 
SLIQ: A fast scalable classifier for data mining.
In: Apers P., Bouzeghoub M., Gardarin G. (eds) Advances in Database Technology
EDBT '96. EDBT 1996. Lecture Notes in Computer Science, vol 1057. Springer, Berlin, Heidelberg

@zouzias zouzias force-pushed the feature/presorted-vectors branch 2 times, most recently from 5552426 to 604b31b Compare October 20, 2019 13:46
@zouzias zouzias changed the title WIP: SLIQ [feature] efficient tree building using SLIQ Oct 21, 2019
zouzias and others added 7 commits October 27, 2019 18:57
* [SLIQ] use vector bool

* WIP

* WIP

* fix bug

* optimized vector<bool> handling

* make code inspection happy

* cleanup classlist

* use shared_ptr

* use vector.at

* replace constexpr with inline
* [improvement] avoid expensive gain improve check

* avoid unecessary vector<long>

* WIP

* clean up
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