| trigonometric.moment {circular} | R Documentation |
Trigonometric Moments
Description
Computes the specified order trigonometric moment for a set of directional data points.
Usage
trigonometric.moment(x, p = 1, center = FALSE, control.circular = list())
Arguments
x |
a vector of class |
p |
order of trigonometric moment to be computed. Default is for a first order trigonometric moment. |
center |
logical, whether to compute centered moments or not. Default is to compute an uncentered moment. |
control.circular |
the attribute of the resulting object |
Value
Returns a list with variables mu, rho, cos, sin, p, n, call, respectively the pth trigonometric moment's direction, resultant length, real and imaginary components, the order, the number of observations and the call.
Author(s)
Claudio Agostinelli and Ulric Lund
References
Jammalamadaka, S. Rao and SenGupta, A. (2001). Topics in Circular Statistics, Section 1.3, World Scientific Press, Singapore.
See Also
var.circular, mean.circular,
summary.circular, mle.vonmises and rho.circular
Examples
x <- rvonmises(100, circular(0), 5)
trigonometric.moment(x, control.circular=list(units="degrees"))