Package trade.invision.indicators.indicators.statistical

Class Variance

java.lang.Object

trade.invision.indicators.indicators.Indicator<Num>

trade.invision.indicators.indicators.statistical.Variance

public class Variance
extends Indicator<Num>

Variance is a Num Indicator to provide the statistical variance (var) over a length of values.

See Also:

• Wikipedia

Nested Class Summary

Nested classes/interfaces inherited from class trade.invision.indicators.indicators.Indicator

Indicator.CacheSeries

Field Summary

Fields inherited from class trade.invision.indicators.indicators.Indicator

cachedAddCallCount, cachedIndex, cachedValue, cacheSeries, minimumStableIndex, series

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Variance(Indicator<Num> indicator, int length, boolean unbiased)

Method Summary

Modifier and Type	Method	Description
protected Num	calculate(long index)	Performs the calculation of this Indicator at the given index.
static Variance	var(Indicator<Num> indicator, int length, boolean unbiased)
static Variance	variance(Indicator<Num> indicator, int length, boolean unbiased)	Gets a Variance.

Methods inherited from class trade.invision.indicators.indicators.Indicator

caching, getMinimumStableIndex, getSeries, getValue, isCaching, numOf, numOf, numOf, numOf, numOfEight, numOfFive, numOfFour, numOfHalf, numOfHundred, numOfHundredth, numOfNegativeOne, numOfNine, numOfOne, numOfSeven, numOfSix, numOfTen, numOfTenth, numOfThousand, numOfThousandth, numOfThree, numOfTwo, numOfZero, purgeCache

Methods inherited from class java.lang.Object

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

Constructor Details

Variance

protected Variance(Indicator<Num> indicator,
 int length,
 boolean unbiased)

Method Details

var

public static Variance var(Indicator<Num> indicator,
 int length,
 boolean unbiased)

See Also:

• variance(Indicator, int, boolean)

variance

public static Variance variance(Indicator<Num> indicator,
 int length,
 boolean unbiased)

Gets a Variance.

Parameters:

indicator - the Indicator

length - the number of values to look back at

unbiased - true to use n - 1 (unbiased) for the divisor in the variance calculation, false to use n (biased)

calculate

protected Num calculate(long index)

Description copied from class: Indicator

Performs the calculation of this Indicator at the given index.

Specified by:

calculate in class Indicator<Num>

Parameters:

index - the index

Returns:

the result (never null)