combinedDegreesOfFreedom

Functions
template<domain D>
D float32	combinedDegreesOfFreedom (D int32[[1]] data1, D bool[[1]] ia1, D int32[[1]] data2, D bool[[1]] ia2)
template<domain D>
D float64	combinedDegreesOfFreedom (D int64[[1]] data1, D bool[[1]] ia1, D int64[[1]] data2, D bool[[1]] ia2)
template<domain D>
D float32	combinedDegreesOfFreedom (D float32[[1]] data1, D bool[[1]] ia1, D float32[[1]] data2, D bool[[1]] ia2)
template<domain D>
D float64	combinedDegreesOfFreedom (D float64[[1]] data1, D bool[[1]] ia1, D float64[[1]] data2, D bool[[1]] ia2)

Detailed Description

Approximate the degrees of freedom of a linear combination of independent sample variances.

Note

Uses the Welch-Satterthwaite equation. It's useful for calculating the degrees of freedom when performing a t-test on samples with unequal variances (Welch's t-test).

D - any protection domain

Supported types - int32 / int64 / float32 / float64

Parameters

data1	- first sample
ia1	- vector indicating which elements of the first sample are available
data2	- second sample
ia2	- vector indicating which elements of the second sample are available

Returns

returns the approximated number of degrees of freedom

Leakage

Leaks the number of true values in ia1 and ia2

Function Documentation

combinedDegreesOfFreedom() [1/4]

D float32 combinedDegreesOfFreedom	(	D float32[[1]]	data1,
		D bool[[1]]	ia1,
		D float32[[1]]	data2,
		D bool[[1]]	ia2
	)

combinedDegreesOfFreedom() [2/4]

D float64 combinedDegreesOfFreedom	(	D float64[[1]]	data1,
		D bool[[1]]	ia1,
		D float64[[1]]	data2,
		D bool[[1]]	ia2
	)

combinedDegreesOfFreedom() [3/4]

D float32 combinedDegreesOfFreedom	(	D int32[[1]]	data1,
		D bool[[1]]	ia1,
		D int32[[1]]	data2,
		D bool[[1]]	ia2
	)

combinedDegreesOfFreedom() [4/4]

D float64 combinedDegreesOfFreedom	(	D int64[[1]]	data1,
		D bool[[1]]	ia1,
		D int64[[1]]	data2,
		D bool[[1]]	ia2
	)