org.apache.spark.mllib.stat.test

Class StudentTTest

java.lang.Object

org.apache.spark.mllib.stat.test.StudentTTest

public class StudentTTest
extends java.lang.Object

Performs Students's 2-sample t-test. The null hypothesis is that the two data sets have equal mean. This test assumes equal variance between the two samples and does not assume equal sample size. For unequal variances, Welch's t-test should be used instead.

See Also:

http://en.wikipedia.org/wiki/Student%27s_t-test

Constructor Summary

Constructors

Constructor and Description
StudentTTest()

Method Summary

Methods

Modifier and Type	Method and Description
static DStream<org.apache.spark.mllib.stat.test.StreamingTestResult>	doTest(DStream<scala.Tuple2<StatCounter,StatCounter>> data)
protected static void	initializeLogIfNecessary(boolean isInterpreter)
protected static boolean	isTraceEnabled()
protected static org.slf4j.Logger	log()
protected static void	logDebug(scala.Function0<java.lang.String> msg)
protected static void	logDebug(scala.Function0<java.lang.String> msg, java.lang.Throwable throwable)
protected static void	logError(scala.Function0<java.lang.String> msg)
protected static void	logError(scala.Function0<java.lang.String> msg, java.lang.Throwable throwable)
protected static void	logInfo(scala.Function0<java.lang.String> msg)
protected static void	logInfo(scala.Function0<java.lang.String> msg, java.lang.Throwable throwable)
protected static java.lang.String	logName()
protected static void	logTrace(scala.Function0<java.lang.String> msg)
protected static void	logTrace(scala.Function0<java.lang.String> msg, java.lang.Throwable throwable)
protected static void	logWarning(scala.Function0<java.lang.String> msg)
protected static void	logWarning(scala.Function0<java.lang.String> msg, java.lang.Throwable throwable)
static java.lang.String	methodName()
static java.lang.String	nullHypothesis()
protected static org.apache.commons.math3.stat.descriptive.StatisticalSummaryValues	toApacheCommonsStats(StatCounter summaryStats)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StudentTTest

public StudentTTest()

Method Detail

methodName

public static final java.lang.String methodName()

nullHypothesis

public static final java.lang.String nullHypothesis()

doTest

public static DStream<org.apache.spark.mllib.stat.test.StreamingTestResult> doTest(DStream<scala.Tuple2<StatCounter,StatCounter>> data)

toApacheCommonsStats

protected static org.apache.commons.math3.stat.descriptive.StatisticalSummaryValues toApacheCommonsStats(StatCounter summaryStats)

logName

protected static java.lang.String logName()

log

protected static org.slf4j.Logger log()

logInfo

protected static void logInfo(scala.Function0<java.lang.String> msg)

logDebug

protected static void logDebug(scala.Function0<java.lang.String> msg)

logTrace

protected static void logTrace(scala.Function0<java.lang.String> msg)

logWarning

protected static void logWarning(scala.Function0<java.lang.String> msg)

logError

protected static void logError(scala.Function0<java.lang.String> msg)

logInfo

protected static void logInfo(scala.Function0<java.lang.String> msg,
           java.lang.Throwable throwable)

logDebug

protected static void logDebug(scala.Function0<java.lang.String> msg,
            java.lang.Throwable throwable)

logTrace

protected static void logTrace(scala.Function0<java.lang.String> msg,
            java.lang.Throwable throwable)

logWarning

protected static void logWarning(scala.Function0<java.lang.String> msg,
              java.lang.Throwable throwable)

logError

protected static void logError(scala.Function0<java.lang.String> msg,
            java.lang.Throwable throwable)

isTraceEnabled

protected static boolean isTraceEnabled()

initializeLogIfNecessary

protected static void initializeLogIfNecessary(boolean isInterpreter)