d41aab4f61
Test the objective functions in regression_obj.cc tests/cpp: Add tests for objective.cc and RegLossObj
68 lines
2.7 KiB
C++
68 lines
2.7 KiB
C++
// Copyright by Contributors
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#include <xgboost/objective.h>
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#include "../helpers.h"
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TEST(Objective, LinearRegressionGPair) {
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xgboost::ObjFunction * obj = xgboost::ObjFunction::Create("reg:linear");
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std::vector<std::pair<std::string, std::string> > args;
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obj->Configure(args);
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CheckObjFunction(obj,
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{0, 0.1, 0.9, 1, 0, 0.1, 0.9, 1},
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{0, 0, 0, 0, 1, 1, 1, 1},
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{1, 1, 1, 1, 1, 1, 1, 1},
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{0, 0.1, 0.9, 1.0, -1.0, -0.9, -0.1, 0},
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{1, 1, 1, 1, 1, 1, 1, 1});
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ASSERT_NO_THROW(obj->DefaultEvalMetric());
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}
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TEST(Objective, LogisticRegressionGPair) {
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xgboost::ObjFunction * obj = xgboost::ObjFunction::Create("reg:logistic");
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std::vector<std::pair<std::string, std::string> > args;
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obj->Configure(args);
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CheckObjFunction(obj,
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{ 0, 0.1, 0.9, 1, 0, 0.1, 0.9, 1},
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{ 0, 0, 0, 0, 1, 1, 1, 1},
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{ 1, 1, 1, 1, 1, 1, 1, 1},
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{ 0.5, 0.52, 0.71, 0.73, -0.5, -0.47, -0.28, -0.26},
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{0.25, 0.24, 0.20, 0.19, 0.25, 0.24, 0.20, 0.19});
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}
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TEST(Objective, LogisticRegressionBasic) {
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xgboost::ObjFunction * obj = xgboost::ObjFunction::Create("reg:logistic");
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std::vector<std::pair<std::string, std::string> > args;
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obj->Configure(args);
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// test label validation
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EXPECT_ANY_THROW(CheckObjFunction(obj, {0}, {10}, {1}, {0}, {0}))
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<< "Expected error when label not in range [0,1] for LogisticRegression";
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// test ProbToMargin
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EXPECT_NEAR(obj->ProbToMargin(0.1), -2.197, 0.01);
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EXPECT_NEAR(obj->ProbToMargin(0.5), 0, 0.01);
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EXPECT_NEAR(obj->ProbToMargin(0.9), 2.197, 0.01);
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EXPECT_ANY_THROW(obj->ProbToMargin(10))
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<< "Expected error when base_score not in range [0,1] for LogisticRegression";
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// test PredTransform
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std::vector<xgboost::bst_float> preds = {0, 0.1, 0.5, 0.9, 1};
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std::vector<xgboost::bst_float> out_preds = {0.5, 0.524, 0.622, 0.710, 0.731};
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obj->PredTransform(&preds);
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for (int i = 0; i < preds.size(); ++i) {
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EXPECT_NEAR(preds[i], out_preds[i], 0.01);
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}
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}
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TEST(Objective, LogisticRawGPair) {
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xgboost::ObjFunction * obj = xgboost::ObjFunction::Create("binary:logitraw");
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std::vector<std::pair<std::string, std::string> > args;
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obj->Configure(args);
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CheckObjFunction(obj,
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{ 0, 0.1, 0.9, 1, 0, 0.1, 0.9, 1},
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{ 0, 0, 0, 0, 1, 1, 1, 1},
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{ 1, 1, 1, 1, 1, 1, 1, 1},
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{ 0.5, 0.52, 0.71, 0.73, -0.5, -0.47, -0.28, -0.26},
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{0.25, 0.24, 0.20, 0.19, 0.25, 0.24, 0.20, 0.19});
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}
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