R: Trigonometric Moments

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 `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`.

### 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"))

[Package circular version 0.4-93 Index]