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author | Devaraj K <devaraj@apache.org> | 2016-02-22 17:16:56 -0800 |
---|---|---|
committer | Xiangrui Meng <meng@databricks.com> | 2016-02-22 17:16:56 -0800 |
commit | 9f410871ca03f4c04bd965b2e4f80167ce543139 (patch) | |
tree | 8c04aa65938c5dbcea96de42463b625ccc0ef313 /examples/src | |
parent | 2063781840831469b394313694bfd25cbde2bb1e (diff) | |
download | spark-9f410871ca03f4c04bd965b2e4f80167ce543139.tar.gz spark-9f410871ca03f4c04bd965b2e4f80167ce543139.tar.bz2 spark-9f410871ca03f4c04bd965b2e4f80167ce543139.zip |
[SPARK-13016][DOCUMENTATION] Replace example code in mllib-dimensionality-reduction.md using include_example
Replaced example example code in mllib-dimensionality-reduction.md using
include_example
Author: Devaraj K <devaraj@apache.org>
Closes #11132 from devaraj-kavali/SPARK-13016.
Diffstat (limited to 'examples/src')
5 files changed, 311 insertions, 0 deletions
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaPCAExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaPCAExample.java new file mode 100644 index 0000000000..faf76a9540 --- /dev/null +++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaPCAExample.java @@ -0,0 +1,65 @@ +/* + * 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.examples.mllib; + +// $example on$ +import java.util.LinkedList; +// $example off$ + +import org.apache.spark.SparkConf; +import org.apache.spark.SparkContext; +// $example on$ +import org.apache.spark.api.java.JavaRDD; +import org.apache.spark.api.java.JavaSparkContext; +import org.apache.spark.mllib.linalg.Matrix; +import org.apache.spark.mllib.linalg.Vector; +import org.apache.spark.mllib.linalg.Vectors; +import org.apache.spark.mllib.linalg.distributed.RowMatrix; +// $example off$ + +/** + * Example for compute principal components on a 'RowMatrix'. + */ +public class JavaPCAExample { + public static void main(String[] args) { + SparkConf conf = new SparkConf().setAppName("PCA Example"); + SparkContext sc = new SparkContext(conf); + + // $example on$ + double[][] array = {{1.12, 2.05, 3.12}, {5.56, 6.28, 8.94}, {10.2, 8.0, 20.5}}; + LinkedList<Vector> rowsList = new LinkedList<Vector>(); + for (int i = 0; i < array.length; i++) { + Vector currentRow = Vectors.dense(array[i]); + rowsList.add(currentRow); + } + JavaRDD<Vector> rows = JavaSparkContext.fromSparkContext(sc).parallelize(rowsList); + + // Create a RowMatrix from JavaRDD<Vector>. + RowMatrix mat = new RowMatrix(rows.rdd()); + + // Compute the top 3 principal components. + Matrix pc = mat.computePrincipalComponents(3); + RowMatrix projected = mat.multiply(pc); + // $example off$ + Vector[] collectPartitions = (Vector[])projected.rows().collect(); + System.out.println("Projected vector of principal component:"); + for (Vector vector : collectPartitions) { + System.out.println("\t" + vector); + } + } +} diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaSVDExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaSVDExample.java new file mode 100644 index 0000000000..f3685db9f2 --- /dev/null +++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaSVDExample.java @@ -0,0 +1,70 @@ +/* + * 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.examples.mllib; + +// $example on$ +import java.util.LinkedList; +// $example off$ + +import org.apache.spark.SparkConf; +import org.apache.spark.SparkContext; +// $example on$ +import org.apache.spark.api.java.JavaRDD; +import org.apache.spark.api.java.JavaSparkContext; +import org.apache.spark.mllib.linalg.Matrix; +import org.apache.spark.mllib.linalg.SingularValueDecomposition; +import org.apache.spark.mllib.linalg.Vector; +import org.apache.spark.mllib.linalg.Vectors; +import org.apache.spark.mllib.linalg.distributed.RowMatrix; +// $example off$ + +/** + * Example for SingularValueDecomposition. + */ +public class JavaSVDExample { + public static void main(String[] args) { + SparkConf conf = new SparkConf().setAppName("SVD Example"); + SparkContext sc = new SparkContext(conf); + + // $example on$ + double[][] array = {{1.12, 2.05, 3.12}, {5.56, 6.28, 8.94}, {10.2, 8.0, 20.5}}; + LinkedList<Vector> rowsList = new LinkedList<Vector>(); + for (int i = 0; i < array.length; i++) { + Vector currentRow = Vectors.dense(array[i]); + rowsList.add(currentRow); + } + JavaRDD<Vector> rows = JavaSparkContext.fromSparkContext(sc).parallelize(rowsList); + + // Create a RowMatrix from JavaRDD<Vector>. + RowMatrix mat = new RowMatrix(rows.rdd()); + + // Compute the top 3 singular values and corresponding singular vectors. + SingularValueDecomposition<RowMatrix, Matrix> svd = mat.computeSVD(3, true, 1.0E-9d); + RowMatrix U = svd.U(); + Vector s = svd.s(); + Matrix V = svd.V(); + // $example off$ + Vector[] collectPartitions = (Vector[]) U.rows().collect(); + System.out.println("U factor is:"); + for (Vector vector : collectPartitions) { + System.out.println("\t" + vector); + } + System.out.println("Singular values are: " + s); + System.out.println("V factor is:\n" + V); + } +} diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/PCAOnRowMatrixExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/PCAOnRowMatrixExample.scala new file mode 100644 index 0000000000..234de230eb --- /dev/null +++ b/examples/src/main/scala/org/apache/spark/examples/mllib/PCAOnRowMatrixExample.scala @@ -0,0 +1,58 @@ +/* + * 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. + */ + +// scalastyle:off println +package org.apache.spark.examples.mllib + +import org.apache.spark.SparkConf +import org.apache.spark.SparkContext +// $example on$ +import org.apache.spark.mllib.linalg.Matrix +import org.apache.spark.mllib.linalg.Vectors +import org.apache.spark.mllib.linalg.distributed.RowMatrix +// $example off$ + +object PCAOnRowMatrixExample { + + def main(args: Array[String]): Unit = { + + val conf = new SparkConf().setAppName("PCAOnRowMatrixExample") + val sc = new SparkContext(conf) + + // $example on$ + val data = Array( + Vectors.sparse(5, Seq((1, 1.0), (3, 7.0))), + Vectors.dense(2.0, 0.0, 3.0, 4.0, 5.0), + Vectors.dense(4.0, 0.0, 0.0, 6.0, 7.0)) + + val dataRDD = sc.parallelize(data, 2) + + val mat: RowMatrix = new RowMatrix(dataRDD) + + // Compute the top 4 principal components. + // Principal components are stored in a local dense matrix. + val pc: Matrix = mat.computePrincipalComponents(4) + + // Project the rows to the linear space spanned by the top 4 principal components. + val projected: RowMatrix = mat.multiply(pc) + // $example off$ + val collect = projected.rows.collect() + println("Projected Row Matrix of principal component:") + collect.foreach { vector => println(vector) } + } +} +// scalastyle:on println diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/PCAOnSourceVectorExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/PCAOnSourceVectorExample.scala new file mode 100644 index 0000000000..f7694879df --- /dev/null +++ b/examples/src/main/scala/org/apache/spark/examples/mllib/PCAOnSourceVectorExample.scala @@ -0,0 +1,57 @@ +/* + * 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. + */ + +// scalastyle:off println +package org.apache.spark.examples.mllib + +import org.apache.spark.SparkConf +import org.apache.spark.SparkContext +// $example on$ +import org.apache.spark.mllib.feature.PCA +import org.apache.spark.mllib.linalg.Vectors +import org.apache.spark.mllib.regression.LabeledPoint +import org.apache.spark.rdd.RDD +// $example off$ + +object PCAOnSourceVectorExample { + + def main(args: Array[String]): Unit = { + + val conf = new SparkConf().setAppName("PCAOnSourceVectorExample") + val sc = new SparkContext(conf) + + // $example on$ + val data: RDD[LabeledPoint] = sc.parallelize(Seq( + new LabeledPoint(0, Vectors.dense(1, 0, 0, 0, 1)), + new LabeledPoint(1, Vectors.dense(1, 1, 0, 1, 0)), + new LabeledPoint(1, Vectors.dense(1, 1, 0, 0, 0)), + new LabeledPoint(0, Vectors.dense(1, 0, 0, 0, 0)), + new LabeledPoint(1, Vectors.dense(1, 1, 0, 0, 0)))) + + // Compute the top 5 principal components. + val pca = new PCA(5).fit(data.map(_.features)) + + // Project vectors to the linear space spanned by the top 5 principal + // components, keeping the label + val projected = data.map(p => p.copy(features = pca.transform(p.features))) + // $example off$ + val collect = projected.collect() + println("Projected vector of principal component:") + collect.foreach { vector => println(vector) } + } +} +// scalastyle:on println diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/SVDExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/SVDExample.scala new file mode 100644 index 0000000000..c26580d4c1 --- /dev/null +++ b/examples/src/main/scala/org/apache/spark/examples/mllib/SVDExample.scala @@ -0,0 +1,61 @@ +/* + * 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. + */ + +// scalastyle:off println +package org.apache.spark.examples.mllib + +import org.apache.spark.SparkConf +import org.apache.spark.SparkContext +// $example on$ +import org.apache.spark.mllib.linalg.Matrix +import org.apache.spark.mllib.linalg.SingularValueDecomposition +import org.apache.spark.mllib.linalg.Vector +import org.apache.spark.mllib.linalg.Vectors +import org.apache.spark.mllib.linalg.distributed.RowMatrix +// $example off$ + +object SVDExample { + + def main(args: Array[String]): Unit = { + + val conf = new SparkConf().setAppName("SVDExample") + val sc = new SparkContext(conf) + + // $example on$ + val data = Array( + Vectors.sparse(5, Seq((1, 1.0), (3, 7.0))), + Vectors.dense(2.0, 0.0, 3.0, 4.0, 5.0), + Vectors.dense(4.0, 0.0, 0.0, 6.0, 7.0)) + + val dataRDD = sc.parallelize(data, 2) + + val mat: RowMatrix = new RowMatrix(dataRDD) + + // Compute the top 5 singular values and corresponding singular vectors. + val svd: SingularValueDecomposition[RowMatrix, Matrix] = mat.computeSVD(5, computeU = true) + val U: RowMatrix = svd.U // The U factor is a RowMatrix. + val s: Vector = svd.s // The singular values are stored in a local dense vector. + val V: Matrix = svd.V // The V factor is a local dense matrix. + // $example off$ + val collect = U.rows.collect() + println("U factor is:") + collect.foreach { vector => println(vector) } + println(s"Singular values are: $s") + println(s"V factor is:\n$V") + } +} +// scalastyle:on println |