| median.circular {circular} | R Documentation |
Median Direction
Description
Sample median direction for a vector of circular data
Usage
## S3 method for class 'circular'
median(x, na.rm = FALSE, ...)
Arguments
x |
a vector. The object is coerced to class
|
na.rm |
logical, indicating if |
... |
NotYetUsed. |
Details
The Definition in equations 2.32 & 2.33 from N.I. Fisher's 'Statistical Analysis of Circular Data', Cambridge Univ. Press 1993. is implemented.
Since version 0.4-4, the algorithm (not the definition) for the
calculation of the median is changed. For a measure of spread associated to the circular median use function meandeviation.
Value
A scalar with the circular median value.
The median is returned as an object of class circular.
Author(s)
Claudio Agostinelli and Alessandro Gagliardi
References
N.I. Fisher (1993) Statistical Analysis of Circular Data, Cambridge University Press.
R.Y. Liu and K. Singh (1992) Ordering Directional Data: Concepts of Data Depth on Circles and Spheres, The Annals of Statistics, vol. 20, n. 3, 1468-1484.
See Also
meandeviation, mean.circular, var.circular, summary.circular, rho.circular and medianHL.circular.
Examples
# Compute the median direction of a random sample of observations.
x <- circular(runif(50, circular(0), pi))
median(x) #only the median is returned
meandeviation(x) #mean deviation is reported