/**
* Copies source to dest.
* <p>Neither source nor dest can be null.</p>
*
* @param source SecondMoment to copy
* @param dest SecondMoment to copy to
* @throws NullArgumentException if either source or dest is null
*/
public static void copy(SecondMoment source, SecondMoment dest)
{
MathUtils.checkNotNull(source);
MathUtils.checkNotNull(dest);
FirstMoment.copy(source, dest);
dest.m2 = source.m2;
}
/**
* {@inheritDoc}
*/
public override UnivariateStatistic copy()//TODO: Supposed to be public override SecondMoment copy()
{
SecondMoment result = new SecondMoment();
// no try-catch or advertised NAE because args are guaranteed non-null
copy(this, result);
return(result);
}
/**
* Copy constructor, creates a new {@code SecondMoment} identical
* to the {@code original}
*
* @param original the {@code SecondMoment} instance to copy
* @throws NullArgumentException if original is null
*/
public SecondMoment(SecondMoment original) : base(original)
{
m2 = original.m2;
}
/**
* Constructs a Variance with the specified <code>isBiasCorrected</code>
* property and the supplied external second moment.
*
* @param isBiasCorrected setting for bias correction - true means
* bias will be corrected
* @param m2 the SecondMoment (Third or Fourth moments work
* here as well.)
*/
public Variance(bool isBiasCorrected, SecondMoment m2)
{
incMoment = false;
moment = m2;
_isBiasCorrected = isBiasCorrected;
}
/**
* Constructs a Variance with the specified <code>isBiasCorrected</code>
* property
*
* @param isBiasCorrected setting for bias correction - true means
* bias will be corrected and is equivalent to using the argumentless
* constructor
*/
public Variance(bool isBiasCorrected)
{
moment = new SecondMoment();
_isBiasCorrected = isBiasCorrected;
}
/**
* Constructs a Variance based on an external second moment.
* When this constructor is used, the statistic may only be
* incremented via the moment, i.e., {@link #increment(double)}
* does nothing; whereas {@code m2.increment(value)} increments
* both {@code m2} and the Variance instance constructed from it.
*
* @param m2 the SecondMoment (Third or Fourth moments work
* here as well.)
*/
public Variance(SecondMoment m2)
{
incMoment = false;
moment = m2;
}
/**
* Constructs a Variance with default (true) <code>isBiasCorrected</code>
* property.
*/
public Variance()
{
moment = new SecondMoment();
}