R: Trigonometric Moments

trig.moment {CircStats} | R Documentation

## Trigonometric Moments

### Description

Computes the specified order trigonometric moment for a set of directional data points.

### Usage

    trig.moment(x, p=1, center=FALSE)

### Arguments

`x` | directional data set measured in radians.
`p` | order of trigonometric moment to be computed. Default is for a first order trigonometric moment.
`center` | logical flag whether to compute centered moments or not. Default is to compute an uncentered moment.

### Value

Returns a data frame with variables mu.p, rho.p, cos.p, and sin.p, respectively the pth trigonometric moment's direction, resultant length, and real and imaginary components.

### References

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

### See Also

circ.disp, circ.mean, circ.summary, est.kappa, est.rho

[Package CircStats version 0.2-4 Index]