R: A measure of deviation for Circular Data

meandeviation {circular} | R Documentation

## A measure of deviation for Circular Data

### Description

Returns a measure of spread associated with the circular median of a vector of circular data.

### Usage

    meandeviation(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.

### Details

See equation (2.33) at pag. 36 in Fisher (1993) for its definition. In the case the circular median is not defined, that is, every angle is a median axis, the mean deviation is not reported and set to `NA`.

### Value

Returns a measure of spread associated with the circular median of a vector of circular data.

### Author(s)

Claudio Agostinelli and Alessandro Gagliardi

### References

N.I. Fisher (1993) Statistical Analysis of Circular Data, Cambridge University Press.

### See Also

`median.circular`, `sd.circular`, `angular.variance`, `angular.deviation`, `mean.circular`, `rho.circular` and `summary.circular`.

### Examples

    x <- rvonmises(n=100, mu=circular(0), kappa=1)
    meandeviation(x)

[Package circular version 0.4-93 Index]