org.apache.mahout.clustering.spectral
Class AffinityMatrixInputMapper
java.lang.Object
org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable,DistributedRowMatrix.MatrixEntryWritable>
org.apache.mahout.clustering.spectral.AffinityMatrixInputMapper
public class AffinityMatrixInputMapper
- extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable,DistributedRowMatrix.MatrixEntryWritable>
Handles reading the files representing the affinity matrix. Since the affinity
matrix is representative of a graph, each line in all the files should
take the form:
i,j,value
where i
and j
are the i
th and
j
data points in the entire set, and value
represents some measurement of their relative absolute magnitudes. This
is, simply, a method for representing a graph textually.
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper |
org.apache.hadoop.mapreduce.Mapper.Context |
Method Summary |
protected void |
map(org.apache.hadoop.io.LongWritable key,
org.apache.hadoop.io.Text value,
org.apache.hadoop.mapreduce.Mapper.Context context)
|
Methods inherited from class org.apache.hadoop.mapreduce.Mapper |
cleanup, run, setup |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
AffinityMatrixInputMapper
public AffinityMatrixInputMapper()
map
protected void map(org.apache.hadoop.io.LongWritable key,
org.apache.hadoop.io.Text value,
org.apache.hadoop.mapreduce.Mapper.Context context)
throws IOException,
InterruptedException
- Overrides:
map
in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable,DistributedRowMatrix.MatrixEntryWritable>
- Throws:
IOException
InterruptedException
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