dir_unif_test_2D: Directional statistics test of uniformity (2D)

View source: R/dir_unif_test_2D.R

dir_unif_test_2DR Documentation

Directional statistics test of uniformity (2D)

Description

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).

Usage

dir_unif_test_2D(x, dir = 1, conf.level = 0.95)

Arguments

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)

Details

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

Value

A list with the mean resultant length, the critical mean resultant length, and the interpretation of these values

References

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.

Examples

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)


maxgav13/GMisc documentation built on June 12, 2022, 3:48 a.m.