dcov {groc}

Distance covariance matrix.

Description

Compute the distance covariance measure of Szekely, Rizzo, and Bakirov (2007) between two samples. Warning: Only valid to compute the distance covariance for two random variables X and Y. This means that X and Y cannot be random Vectors. If this is the case, consider the package energy.

Usage

dcov(x, y, Cpp = TRUE)

Arguments

x

data of first sample

y

data of second sample

Cpp

logical. If TRUE (the default), computations are performed using a C version of the code.

Details

See energy.

Value

returns the sample distance covariance.

Author(s)

Martin Bilodeau ([e-mail]) and Pierre Lafaye de Micheaux ([e-mail])

References

Szekely, G.J., Rizzo, M.L., and Bakirov, N.K. (2007), Measuring and Testing Dependence by Correlation of Distances, Annals of Statistics, Vol. 35 No. 6, pp. 2769-2794.
doi:10.1214/009053607000000505

See Also

covrob, corrob

Examples

data(stackloss)
dcov(stackloss$Air.Flow,stackloss$Water.Temp)