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[jvm-packages] support specified feature names when getModelDump and getFeatureScore (#3733)

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* [jvm-packages] support specified feature names for jvm when get ModelDump and get FeatureScore (#3725)

* typo and style fix
This commit is contained in:
zengxy
2018-10-05 00:05:42 +08:00
committed by Nan Zhu
parent 34522d56f0
commit 9e73087324
6 changed files with 161 additions and 3 deletions
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18
jvm-packages/xgboost4j/src/test/java/ml/dmlc/xgboost4j/java/BoosterImplTest.java
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@@ -271,6 +271,24 @@ public class BoosterImplTest {
Booster booster = trainBooster(trainMat, testMat);
String[] dump = booster.getModelDump("", false, "json");
TestCase.assertEquals(" { \"nodeid\":", dump[0].substring(0, 13));
// test with specified feature names
String[] featureNames = new String[126];
for(int i = 0; i < 126; i++) featureNames[i] = "test_feature_name_" + i;
dump = booster.getModelDump(featureNames, false, "json");
TestCase.assertTrue(dump[0].contains("test_feature_name_"));
}
@Test
public void testGetFeatureImportance() throws XGBoostError {
DMatrix trainMat = new DMatrix("../../demo/data/agaricus.txt.train");
DMatrix testMat = new DMatrix("../../demo/data/agaricus.txt.test");
Booster booster = trainBooster(trainMat, testMat);
String[] featureNames = new String[126];
for(int i = 0; i < 126; i++) featureNames[i] = "test_feature_name_" + i;
Map<String, Integer> scoreMap = booster.getFeatureScore(featureNames);
for (String fName: scoreMap.keySet()) TestCase.assertTrue(fName.startsWith("test_feature_name_"));
}
@Test