Estimates concentration parameter, angular standard deviation, and
confidence limit.
Usage
fisher_statistics(x, w = NULL, alpha = 0.05, na.rm = TRUE)
Arguments
- x
object of class "Vec3", "Line", or "Plane".
- w
numeric. Optional weights for each observation.
- alpha
numeric. Significance level for the confidence angle (default is 0.05 for a 95% confidence angle).
- na.rm
logical. Whether NA values should be removed before the computation proceeds.
Value
list, with
"k"estimated concentration parameter \(\kappa\) for the von Mises-Fisher
distribution
"csd"estimated angular standard deviation enclosing 63% of the orientation data. Angle is in degrees if x is a spherical object, and raidan if otherwise.
"a95"Confidence limit for given p. Angle is in degrees if x is a spherical object, and raidan if otherwise.
Examples
set.seed(20250411)
x <- rvmf(100, mu = Line(120, 50), k = 5)
fisher_statistics(x)
#> $k
#> [1] 4.416173
#>
#> $csd
#> [1] 38.54446
#>
#> $csd_2s
#> [1] 66.62006
#>
#> $alpha
#> [1] 7.640117
#>