5d74578095
As discussed in issue #1978, tree_method=hist ignores the parameter param.num_roots; it simply assumes that the tree has only one root. In particular, when InitData() method initializes row_set_collection_, it simply assigns all rows to node 0, the value that's hard-coded. For now, the updater will simply fail when num_roots exceeds 1. I will revise the updater soon to support multiple roots.
37 lines
968 B
C++
37 lines
968 B
C++
/*!
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* Copyright 2015 by Contributors
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* \file tree_updater.cc
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* \brief Registry of tree updaters.
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*/
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#include <xgboost/tree_updater.h>
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#include <dmlc/registry.h>
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namespace dmlc {
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DMLC_REGISTRY_ENABLE(::xgboost::TreeUpdaterReg);
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} // namespace dmlc
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namespace xgboost {
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TreeUpdater* TreeUpdater::Create(const std::string& name) {
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auto *e = ::dmlc::Registry< ::xgboost::TreeUpdaterReg>::Get()->Find(name);
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if (e == nullptr) {
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LOG(FATAL) << "Unknown tree updater " << name;
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}
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return (e->body)();
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}
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} // namespace xgboost
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namespace xgboost {
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namespace tree {
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// List of files that will be force linked in static links.
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DMLC_REGISTRY_LINK_TAG(updater_colmaker);
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DMLC_REGISTRY_LINK_TAG(updater_skmaker);
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DMLC_REGISTRY_LINK_TAG(updater_refresh);
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DMLC_REGISTRY_LINK_TAG(updater_prune);
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DMLC_REGISTRY_LINK_TAG(updater_fast_hist);
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DMLC_REGISTRY_LINK_TAG(updater_histmaker);
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DMLC_REGISTRY_LINK_TAG(updater_sync);
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} // namespace tree
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} // namespace xgboost
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