covQn {tsqn}

Robust covariance between the variables x and y

Description

Computes the robust covariance of x and y proposed by Ma and Genton (2001) using the robust scale Qn of Rousseeuw and Croux (1993).

Usage

covQn(x, y)

Arguments

x

a numeric vector

y

a numeric vector

Value

a numerical value with the robust covariance between x and y

References

Ma, Y. and Genton, M. G. (2001) Highly robust estimation of dispersion matrices. Journal of Multivariate Analysis, 78, 11–36.

Rousseeuw, P. J. and Croux, C. (1993) Alternatives to the median absolute deviation. Journal of the American Statistical Association, 88, 1273–1283.

Examples

covQn(rnorm(100),rnorm(100))