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java.lang.Object org.apache.pig.EvalFunc<T> datafu.pig.util.SimpleEvalFunc<org.apache.pig.data.Tuple> datafu.pig.stats.Quantile datafu.pig.stats.Median
public class Median
Computes the median for a sorted input bag, using type R-2 estimation. This is a convenience wrapper around Quantile.
N.B., all the data is pushed to a single reducer per key, so make sure some partitioning is done (e.g., group by 'day') if the data is too large. That is, this isn't distributed median.
Quantile
Field Summary |
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Fields inherited from class org.apache.pig.EvalFunc |
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log, pigLogger, reporter, returnType |
Constructor Summary | |
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Median()
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Method Summary |
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Methods inherited from class datafu.pig.stats.Quantile |
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call, outputSchema |
Methods inherited from class datafu.pig.util.SimpleEvalFunc |
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exec, getReturnType |
Methods inherited from class org.apache.pig.EvalFunc |
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finish, getArgToFuncMapping, getCacheFiles, getInputSchema, getLogger, getPigLogger, getReporter, getSchemaName, isAsynchronous, progress, setInputSchema, setPigLogger, setReporter, setUDFContextSignature, warn |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public Median()
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