Computes the specified order trigonometric moment for a set of directional data points.
Usage
trigonometric.moment(x, p = 1, center = FALSE, control.circular = list())
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.
Arguments
x
a vector of class circular.
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 mu.
Author
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