Sketching from adapters (#5365)

* Sketching from adapters * Add weights test
2020-03-07 21:07:58 +13:00
parent 0dd97c206b
commit a38e7bd19c
11 changed files with 780 additions and 624 deletions
--- a/src/data/adapter.h
+++ b/src/data/adapter.h
@@ -71,6 +71,7 @@ namespace data {
 constexpr size_t kAdapterUnknownSize = std::numeric_limits<size_t >::max();

 struct COOTuple {
+  COOTuple() = default;
  XGBOOST_DEVICE COOTuple(size_t row_idx, size_t column_idx, float value)
      : row_idx(row_idx), column_idx(column_idx), value(value) {}