[mlpack-git] [mlpack/mlpack] Density Estimation Tree made sparse-enabled (#802)

[Ivan Georgiev]

DET class can now work with Arma's sparse matrices. Also:
- The class is templated, so the matrix type becomes template argument.
- Couple of optimizations regarding matrix copying, incl. in dense matrix case.
- OpenMP-ification of tree building routine.
- Added few test cases with `arma::SpMat` data.

You can view, comment on, or merge this pull request online at:

  https://github.com/mlpack/mlpack/pull/802

-- Commit Summary --

  * - Mac gitignore changes.
  * Merge remote-tracking branch 'upstream/master'
  * - DTree class templated.
  * - First successfull builtd.
  * - DET changes propagated to tests.
  * - DET templating ready and tests passing.
  * - More sparse-matrix migration steps.
  * - First successfull SpMat build.
  * - Sparse DTree finally working.
  * - All DET sparsification works.
  * - OMP test line removed.
  * Merge remote-tracking branch 'upstream/master'
  * - DTree class templated.
  * - First successfull builtd.
  * - DET changes propagated to tests.
  * - DET templating ready and tests passing.
  * - More sparse-matrix migration steps.
  * - First successfull SpMat build.
  * - Sparse DTree finally working.
  * - All DET sparsification works.
  * - OMP test line removed.
  * Merge remote-tracking branch 'origin/feature/det_sparse' into feature/det_sparse

-- File Changes --

    M .gitignore (2)
    M src/mlpack/core/arma_extend/Mat_extra_bones.hpp (9)
    M src/mlpack/core/arma_extend/SpMat_extra_bones.hpp (8)
    M src/mlpack/methods/det/CMakeLists.txt (6)
    M src/mlpack/methods/det/det_main.cpp (5)
    M src/mlpack/methods/det/dt_utils.hpp (23)
    R src/mlpack/methods/det/dt_utils_impl.hpp (76)
    M src/mlpack/methods/det/dtree.hpp (105)
    R src/mlpack/methods/det/dtree_impl.hpp (410)
    M src/mlpack/tests/det_test.cpp (162)
    M src/mlpack/tests/serialization_test.cpp (15)

-- Patch Links --

https://github.com/mlpack/mlpack/pull/802.patch
https://github.com/mlpack/mlpack/pull/802.diff

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