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java.lang.Objectorg.apache.mahout.clustering.streaming.mapreduce.StreamingKMeansUtilsMR
public final class StreamingKMeansUtilsMR
Method Summary | |
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static Iterable<Centroid> |
castVectorsToCentroids(Iterable<Vector> input)
Returns an Iterable of Centroid from an Iterable of Vector by either casting each Vector to Centroid (if the instance extends Centroid) or create a new Centroid based on that Vector. |
static Iterable<Centroid> |
getCentroidsFromVectorWritable(Iterable<VectorWritable> inputIterable)
Returns an Iterable of centroids from an Iterable of VectorWritables by creating a new Centroid containing a RandomAccessSparseVector as a delegate for each VectorWritable. |
static UpdatableSearcher |
searcherFromConfiguration(org.apache.hadoop.conf.Configuration conf)
Instantiates a searcher from a given configuration. |
static void |
writeCentroidsToSequenceFile(Iterable<Centroid> centroids,
org.apache.hadoop.fs.Path path,
org.apache.hadoop.conf.Configuration conf)
Writes centroids to a sequence file. |
static void |
writeVectorsToSequenceFile(Iterable<? extends Vector> datapoints,
org.apache.hadoop.fs.Path path,
org.apache.hadoop.conf.Configuration conf)
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Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
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public static UpdatableSearcher searcherFromConfiguration(org.apache.hadoop.conf.Configuration conf)
conf
- the configuration
RuntimeException
- if the distance measure class cannot be instantiated
IllegalStateException
- if an unknown searcher class was requestedpublic static Iterable<Centroid> getCentroidsFromVectorWritable(Iterable<VectorWritable> inputIterable)
inputIterable
- VectorWritable Iterable to get Centroids from
public static Iterable<Centroid> castVectorsToCentroids(Iterable<Vector> input)
input
- Iterable of Vectors to cast
public static void writeCentroidsToSequenceFile(Iterable<Centroid> centroids, org.apache.hadoop.fs.Path path, org.apache.hadoop.conf.Configuration conf) throws IOException
centroids
- the centroids to write.path
- the path of the output file.conf
- the configuration for the HDFS to write the file to.
IOException
public static void writeVectorsToSequenceFile(Iterable<? extends Vector> datapoints, org.apache.hadoop.fs.Path path, org.apache.hadoop.conf.Configuration conf) throws IOException
IOException
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