Directional statistics test of uniformity (3D)

Source: R/dir_unif_test_3D.R

Performes the uniformity test, for the 3D case, for a set of angle measurements to determine if they come from a uniform distribution (no prefered mean direction).

dir_unif_test_3D(dir, dip, conf.level = 0.95)

Arguments

dir

A vector of dip directions measurements in degrees
dip

A vector of dip angles measurements in degrees
conf.level

Confidence level to use for the critical value (Default is 0.95, and see details section below)

Value

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

Details

The options for confidence level are 0.99, 0.975, 0.95, or 0.90

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

dir = c(12,18,22,15,10,20)
dip = c(42,40,48,30,42,30)
dir_unif_test_3D(dir, dip)

#> $R
#> [1] 0.992
#> 
#> $Rcrit
#> [1] 0.645
#> 
#> $interpretation
#> [1] "Reject H0 and conclude that the sample has a preferred mean direction"
#>