Returns the mean resultant length of a vector of circular data.
Usage
est.rho(x)
Arguments
x
vector of data points measured in radians.
Value
Returns the mean resultant length of data.
Details
Each observation is treated as a unit vector, or point on the unit circle. The resultant vector of the observations is found, and the length of the resultant vector divided by the sample size is returned.
References
Jammalamadaka, S. Rao and SenGupta, A. (2001). Topics in Circular Statistics, Section 1.3, World Scientific Press, Singapore.