circular (version 0.4-93)

angular.variance: A measure of variance for Circular Data

Description

Returns twice one minus the mean resultant length divided by the sample size of a vector of circular data.

Usage

angular.variance(x, na.rm = FALSE)

Arguments

x

a vector. The object is coerced to class circular.

na.rm

logical, indicating if NA's should be omitted.

Value

Returns twice one minus the mean resultant length divided by the sample size.

References

Batchelet, E. (1981) Circular Statistics in Biology. Academic Press, London.

Jammalamadaka, S. Rao and SenGupta, A. (2001). Topics in Circular Statistics, Section 1.3, World Scientific Press, Singapore.

Zar, J.H. (2010) Biostatistical Analysis. Fifth edition. Pearson Educational International.

See Also

var.circular, angular.deviation, mean.circular, rho.circular and summary.circular.

Examples

# NOT RUN {
x <- rvonmises(n=100, mu=circular(0), kappa=1)
angular.variance(x)
# }