org.apache.mahout.math.hadoop.stats
Class StandardDeviationCalculatorMapper
java.lang.Object
org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.Writable,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.DoubleWritable>
org.apache.mahout.math.hadoop.stats.StandardDeviationCalculatorMapper
public class StandardDeviationCalculatorMapper
- extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.Writable,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.DoubleWritable>
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper |
org.apache.hadoop.mapreduce.Mapper.Context |
Field Summary |
static org.apache.hadoop.io.IntWritable |
SUM
|
static org.apache.hadoop.io.IntWritable |
SUM_OF_SQUARES
|
static org.apache.hadoop.io.IntWritable |
TOTAL_COUNT
|
Method Summary |
protected void |
map(org.apache.hadoop.io.IntWritable key,
org.apache.hadoop.io.Writable 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 |
SUM_OF_SQUARES
public static final org.apache.hadoop.io.IntWritable SUM_OF_SQUARES
SUM
public static final org.apache.hadoop.io.IntWritable SUM
TOTAL_COUNT
public static final org.apache.hadoop.io.IntWritable TOTAL_COUNT
StandardDeviationCalculatorMapper
public StandardDeviationCalculatorMapper()
map
protected void map(org.apache.hadoop.io.IntWritable key,
org.apache.hadoop.io.Writable value,
org.apache.hadoop.mapreduce.Mapper.Context context)
throws IOException,
InterruptedException
- Overrides:
map
in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.Writable,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.DoubleWritable>
- Throws:
IOException
InterruptedException
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