* add qid for https://github.com/dmlc/xgboost/issues/2748

* change names

* change spaces
...

* allow arbitrary cross validation fold indices

- use training indices passed to `folds` par...

* Add (load|save)_model to XGBModel

* Add docstring

* Fix docstring

* Fix mixed use of ...

* Convert SegFault to user-friendly error.

* Apply the change to DMatrix API as well

Be clear that they do not save Python-specific attributes

* fix tweedie margin calculations

* add entry to contributors

* Refactor to allow for custom regularisation methods

* Implement compositional SplitEvaluato...

CI tests were failing because wget prompts "the user" for a response
whenever the google test a...

* Add unit test utility

* Refactor updater tests. Add coverage for histmaker.

* added code for instance based weighing for rank objectives

* Fix lint

* add back train method but mark as deprecated

* add back train method but mark as deprecated...

* Allow import via python datatable.

* Write unit tests

* Refactor dt API functions

* R...

* Added latest version number example

* Added latest version number example

* Use shared memory atomics for building histograms, whenever possible

* add back train method but mark as deprecated

* add back train method but mark as deprecated...

* fix CRAN check

* Update submodules dmlc-core and rabit

* Add kintr to rmingw test

DMLC_LOG_STACK_TRACE involves use of non-standard header execinfo.h, which
causes compilation f...

* Use sparse page as singular CSR matrix representation

* Simplify dmatrix methods

* Reduc...

* GPU binning and compression.

- binning and index compression are done inside the DeviceShar...

Currently, `CLIPredict()` saves prediction results in default 6-digit precision which causes pre...

* add back train method but mark as deprecated

* add back train method but mark as deprecated...

* Fix print.xgb.Booster

valid_handle should be TRUE when x$handle is NOT null

* Update xgb...

* Add validate_features option for Booster predict

* Fix trailing whitespace in docstring

* Add option to use weights when evaluating metrics in validation sets

* Add test for validat...

* For CRAN submission, remove all #pragma's that suppress compiler warnings

A few headers in ...

As before, the compilation error is caused by mixing positional and
labelled arguments.

* Add cuda 8/9.1 centos 6 builds, test GPU wheel on CPU only container.

* Add Google test

* fix for CRAN manual checks

* fix for CRAN manual checks

* pass local check

* fix vari...

* add back train method but mark as deprecated

* add back train method but mark as deprecated...

* Update dmlc-core submodule

* Fix dense_parser to work with the latest dmlc-core

* Specif...

* Adjust xgboost entries in .gitignore

They were overly broad. In particularly this was incon...

* Increase precision of bst_float values in tree dumps

* Increase precision of bst_float valu...

* Prevent Hessian in multiclass objective becoming zero

* Set default learning rate to 0.5 fo...

* Multi-GPU HostDeviceVector.

- HostDeviceVector instances can now span multiple devices, def...

* add back train method but mark as deprecated

* add back train method but mark as deprecated...

* add back train method but mark as deprecated

* add back train method but mark as deprecated...

* add back train method but mark as deprecated

* add back train method but mark as deprecated...

* Implement GPU accelerated coordinate descent algorithm.

* Exclude external memory tests fo...

* Clang-tidy static analysis

* Modernise checks

* Google coding standard checks

* Ident...

The R package dependency 'data.table' is apparently unavailable in Windows binary format, result...

* add back train method but mark as deprecated

* add back train method but mark as deprecated...

* Fix logic in GPU predictor cache lookup

* Add sklearn test for GPU prediction

* Change reduce operation from thrust to cub. Fix for cuda 9.1 runtime error

* Unit test sum ...

* Now `make pippack` works without any manual action: it will produce
xgboost-[version].tar.g...

* modify test_helper.R

* fix noLD

* update desc

* fix solaris test

* fix desc

* i...

So other things can be added in comment field, such as ORCID.

* rank_metric: add AUC-PR

Implementation of the AUC-PR calculation for weighted data, propose...

Without this, with gcc 7.3.0, we see things like:

/xgboost/include/xgboost/c_api.h:98:1: erro...

* Fix memory leak in XGDMatrixCreateFromMat_omp()

This replaces the array allocated by new wi...

* Fixes #3162

Minor performance improvements to gpu predictor

* fix rebase conflict

* [core] additional gblinear improvements

* [R] callback for gblinea...

* Added back UpdatePredictionCache() in updater_gpu_hist.cu.

- it had been there before, but ...

* Extended monotonic constraints support to 'hist' tree method.

* Added monotonic constraints...

* Support CSV file in DMatrix

We'd just need to expose the CSV parser in dmlc-core to the Pyt...

* Replaced std::vector-based interfaces with HostDeviceVector-based interfaces.

- replacement...

* Fix doc build

ReadTheDocs build has been broken for a while due to incompatibilities betwee...

* modify build guide from source on macOS

* fix; installation for macOS

* Refactor linear modelling and add new coordinate descent updater

* Allow unsorted column it...

* fix prediction caching inefficiency for multiclass

* silence some warnings

* redundant i...