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author | Xiangrui Meng <meng@databricks.com> | 2016-06-14 18:57:45 -0700 |
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committer | Yanbo Liang <ybliang8@gmail.com> | 2016-06-14 18:57:45 -0700 |
commit | 63e0aebe22ba41c636ecaddd8647721d7690a1ec (patch) | |
tree | 666ea76b8d347441d7a0f5116db56304f81ef16a /mllib/src/test/java | |
parent | 42a28caf1001244d617b9256de196129348f2fef (diff) | |
download | spark-63e0aebe22ba41c636ecaddd8647721d7690a1ec.tar.gz spark-63e0aebe22ba41c636ecaddd8647721d7690a1ec.tar.bz2 spark-63e0aebe22ba41c636ecaddd8647721d7690a1ec.zip |
[SPARK-15945][MLLIB] Conversion between old/new vector columns in a DataFrame (Scala/Java)
## What changes were proposed in this pull request?
This PR provides conversion utils between old/new vector columns in a DataFrame. So users can use it to migrate their datasets and pipelines manually. The methods are implemented under `MLUtils` and called `convertVectorColumnsToML` and `convertVectorColumnsFromML`. Both take a DataFrame and a list of vector columns to be converted. It is a no-op on vector columns that are already converted. A warning message is logged if actual conversion happens.
This is the first sub-task under SPARK-15944 to make it easier to migrate existing pipelines to Spark 2.0.
## How was this patch tested?
Unit tests in Scala and Java.
cc: yanboliang
Author: Xiangrui Meng <meng@databricks.com>
Closes #13662 from mengxr/SPARK-15945.
Diffstat (limited to 'mllib/src/test/java')
-rw-r--r-- | mllib/src/test/java/org/apache/spark/mllib/util/JavaMLUtilsSuite.java | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/mllib/src/test/java/org/apache/spark/mllib/util/JavaMLUtilsSuite.java b/mllib/src/test/java/org/apache/spark/mllib/util/JavaMLUtilsSuite.java new file mode 100644 index 0000000000..2fa0bd2546 --- /dev/null +++ b/mllib/src/test/java/org/apache/spark/mllib/util/JavaMLUtilsSuite.java @@ -0,0 +1,49 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.spark.mllib.util; + +import java.util.Collections; + +import org.junit.Assert; +import org.junit.Test; + +import org.apache.spark.SharedSparkSession; +import org.apache.spark.mllib.linalg.Vector; +import org.apache.spark.mllib.linalg.Vectors; +import org.apache.spark.mllib.regression.LabeledPoint; +import org.apache.spark.sql.Dataset; +import org.apache.spark.sql.Row; +import org.apache.spark.sql.RowFactory; + +public class JavaMLUtilsSuite extends SharedSparkSession { + + @Test + public void testConvertVectorColumnsToAndFromML() { + Vector x = Vectors.dense(2.0); + Dataset<Row> dataset = spark.createDataFrame( + Collections.singletonList(new LabeledPoint(1.0, x)), LabeledPoint.class + ).select("label", "features"); + Dataset<Row> newDataset1 = MLUtils.convertVectorColumnsToML(dataset); + Row new1 = newDataset1.first(); + Assert.assertEquals(RowFactory.create(1.0, x.asML()), new1); + Row new2 = MLUtils.convertVectorColumnsToML(dataset, "features").first(); + Assert.assertEquals(new1, new2); + Row old1 = MLUtils.convertVectorColumnsFromML(newDataset1).first(); + Assert.assertEquals(RowFactory.create(1.0, x), old1); + } +} |