本文整理汇总了Java中org.apache.mahout.math.NamedVector类的典型用法代码示例。如果您正苦于以下问题：Java NamedVector类的具体用法？Java NamedVector怎么用？Java NamedVector使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
NamedVector类属于org.apache.mahout.math包，在下文中一共展示了NamedVector类的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: doTestVectorWritableEquals
import org.apache.mahout.math.NamedVector; //导入依赖的package包/类
private static void doTestVectorWritableEquals(Vector v) throws IOException {
Writable vectorWritable = new VectorWritable(v);
VectorWritable vectorWritable2 = new VectorWritable();
writeAndRead(vectorWritable, vectorWritable2);
Vector v2 = vectorWritable2.get();
if (v instanceof NamedVector) {
assertTrue(v2 instanceof NamedVector);
NamedVector nv = (NamedVector) v;
NamedVector nv2 = (NamedVector) v2;
assertEquals(nv.getName(), nv2.getName());
assertEquals("Victor", nv.getName());
}
assertEquals(v, v2);
}
示例2: loadVectors
import org.apache.mahout.math.NamedVector; //导入依赖的package包/类
private static Matrix loadVectors(String vectorPathString, Configuration conf)
throws IOException {
Path vectorPath = new Path(vectorPathString);
FileSystem fs = vectorPath.getFileSystem(conf);
List<Path> subPaths = Lists.newArrayList();
if (fs.isFile(vectorPath)) {
subPaths.add(vectorPath);
} else {
for (FileStatus fileStatus : fs.listStatus(vectorPath, PathFilters.logsCRCFilter())) {
subPaths.add(fileStatus.getPath());
}
}
List<Pair<Integer, Vector>> rowList = Lists.newArrayList();
int numRows = Integer.MIN_VALUE;
int numCols = -1;
boolean sequentialAccess = false;
for (Path subPath : subPaths) {
for (Pair<IntWritable, VectorWritable> record
: new SequenceFileIterable<IntWritable, VectorWritable>(subPath, true, conf)) {
int id = record.getFirst().get();
Vector vector = record.getSecond().get();
if (vector instanceof NamedVector) {
vector = ((NamedVector)vector).getDelegate();
}
if (numCols < 0) {
numCols = vector.size();
sequentialAccess = vector.isSequentialAccess();
}
rowList.add(Pair.of(id, vector));
numRows = Math.max(numRows, id);
}
}
numRows++;
Vector[] rowVectors = new Vector[numRows];
for (Pair<Integer, Vector> pair : rowList) {
rowVectors[pair.getFirst()] = pair.getSecond();
}
return new SparseRowMatrix(numRows, numCols, rowVectors, true, !sequentialAccess);
}
示例3: writeVector
import org.apache.mahout.math.NamedVector; //导入依赖的package包/类
@Override
public void writeVector(MySparseVector vector) throws IOException {
String docIdName = String.format("%09d", ++docId); //mahout stores doc ids as Text
RandomAccessSparseVector vec = new RandomAccessSparseVector(termcount);
for (int i = 0; i < vector.indices.size(); i++)
vec.setQuick(vector.indices.get(i), vector.values.get(i));
NamedVector nv = new NamedVector(vec, docIdName);
tfidfWriter.append(new Text(docIdName), new VectorWritable(nv));
}
示例4: clusterOutput
import org.apache.mahout.math.NamedVector; //导入依赖的package包/类
public static void clusterOutput(Configuration conf, Path path) {
try {
BufferedWriter bw;
FileSystem fs = FileSystem.get(conf);
SequenceFile.Reader reader = null;
reader = new SequenceFile.Reader(fs, path, conf);
// 将分组信息写到文件uidOfgrp.txt，每行格式为 uid \t groupID
bw = new BufferedWriter(new FileWriter(new File("C:\\Users\\Hk\\Desktop\\ClusterPointsInfo.txt")));
HashMap<String, Integer> clusterIds;
clusterIds = new HashMap<String, Integer>(120);
IntWritable key = new IntWritable();
WeightedPropertyVectorWritable value = new WeightedPropertyVectorWritable();
// WeightedVectorWritable value = new WeightedVectorWritable();
while (reader.next(key, value)) {
NamedVector vector = (NamedVector) value.getVector();
// 得到Vector的Name标识
String vectorName = vector.getName();
System.out.println(vectorName + "\t" + key.toString());
bw.write(vectorName + "\t" + key.toString() + "\n");
// 更新每个group的大小
if (clusterIds.containsKey(key.toString())) {
clusterIds.put(key.toString(), clusterIds.get(key.toString()) + 1);
} else
clusterIds.put(key.toString(), 1);
}
bw.flush();
reader.close();
// 将每个group的大小，写入grpSize文件中
bw = new BufferedWriter(new FileWriter(new File("C:\\Users\\Hk\\Desktop\\ClusterPointsSize.txt")));
Set<String> keys = clusterIds.keySet();
for (String k : keys) {
System.out.println(k + " " + clusterIds.get(k));
bw.write(k + " " + clusterIds.get(k) + "\n");
}
bw.flush();
bw.close();
} catch (IOException e) {
e.printStackTrace();
}
}