Performes the uniformity test, for the 2D case, for a set of angle measurements to determine if they come from a uniform distribution (no prefered mean direction).
dir_unif_test_2D(x, dir = 1, conf.level = 0.95)
| x | A vector of angular measurements in degrees |
|---|---|
| dir | A logical indicating if the data are directional (1) or non-directional (0) |
| conf.level | Confidence level to use for the critical value (Default is 0.95, and see details section below) |
A list with the mean resultant length, the critical mean resultant length, and the interpretation of these values
Directional data refers to dipping planes or lines, data expressed as dip direction (trend). Non-directional data refers to strike or lineations expressed as azimuths that can take two angles (i.e. 45 or 225). The options for confidence level are 0.99, 0.975, 0.95, or 0.90
Davis, J. C. (2002). Statistical and Data Analysis in Geology. 3rd ed. John Wiley & Sons.
Swan, A. R. H. & Sandilands, M. (1995). Introduction to Geological Data Analysis. Blackwell Science.
Borradaile, G. (2003). Statistics of Earth Science Data. Springer.
x = c(255, 239, 222, 231, 199, 271, 222, 274, 228, 246, 177, 199, 257, 201, 237, 209, 216, 180, 182, 250, 219, 196, 197, 246, 218, 235, 232, 243, 232, 180, 231, 254, 242, 149, 212, 210, 230, 205, 220, 268) dir_unif_test_2D(x)#> $R #> [1] 35.6055 #> #> $Rcrit #> [1] 0.273 #> #> $interpretation #> [1] "Reject H0 and conclude that the sample has a preferred mean direction" #>