本文整理匯總了Java中org.apache.spark.api.java.JavaRDD.cartesian方法的典型用法代碼示例。如果您正苦於以下問題：Java JavaRDD.cartesian方法的具體用法？Java JavaRDD.cartesian怎麽用？Java JavaRDD.cartesian使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類org.apache.spark.api.java.JavaRDD的用法示例。
在下文中一共展示了JavaRDD.cartesian方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: calculateSimilarityFromVector
import org.apache.spark.api.java.JavaRDD; //導入方法依賴的package包/類
/**
* Calculate term similarity from vector.
*
* @param importRDD the {@link org.apache.spark.api.java.JavaPairRDD}
* data structure containing the vectors.
* @param simType the similarity calculation to execute e.g.
* <ul>
* <li>{@link org.apache.sdap.mudrod.utils.SimilarityUtil#SIM_COSINE} - 3,</li>
* <li>{@link org.apache.sdap.mudrod.utils.SimilarityUtil#SIM_HELLINGER} - 2,</li>
* <li>{@link org.apache.sdap.mudrod.utils.SimilarityUtil#SIM_PEARSON} - 1</li>
* </ul>
* @return a new {@link org.apache.spark.api.java.JavaPairRDD}
*/
public static JavaRDD<LinkageTriple> calculateSimilarityFromVector(JavaPairRDD<String, Vector> importRDD, int simType) {
JavaRDD<Tuple2<String, Vector>> importRDD1 = importRDD.map(f -> new Tuple2<String, Vector>(f._1, f._2));
JavaPairRDD<Tuple2<String, Vector>, Tuple2<String, Vector>> cartesianRDD = importRDD1.cartesian(importRDD1);
return cartesianRDD.map(new Function<Tuple2<Tuple2<String, Vector>, Tuple2<String, Vector>>, LinkageTriple>() {
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
public LinkageTriple call(Tuple2<Tuple2<String, Vector>, Tuple2<String, Vector>> arg) {
String keyA = arg._1._1;
String keyB = arg._2._1;
if (keyA.equals(keyB)) {
return null;
}
Vector vecA = arg._1._2;
Vector vecB = arg._2._2;
Double weight = 0.0;
if (simType == SimilarityUtil.SIM_PEARSON) {
weight = SimilarityUtil.pearsonDistance(vecA, vecB);
} else if (simType == SimilarityUtil.SIM_HELLINGER) {
weight = SimilarityUtil.hellingerDistance(vecA, vecB);
}
LinkageTriple triple = new LinkageTriple();
triple.keyA = keyA;
triple.keyB = keyB;
triple.weight = weight;
return triple;
}
}).filter(new Function<LinkageTriple, Boolean>() {
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
public Boolean call(LinkageTriple arg0) throws Exception {
if (arg0 == null) {
return false;
}
return true;
}
});
}