Performes the two-sample test, for the 2D case, for a pair of angle measurements to determine if they could belong to the same population (event).
dir_2sample_test_2D(x, y, dir = 1, conf.level = 0.95)
| x | A vector of angular measurements in degrees for sample 1 |
|---|---|
| y | A vector of angular measurements in degrees for sample 2 |
| dir | A logical indicating if the data are directional (1) or non-directional (0) |
| conf.level | Confidence level for the F-statistic calculation and p-value interpretation (Default is 0.95) |
A list with the F-statistic, the critical value of F, the degrees of freedom, the p-value, 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)
Swan, A. R. H. & Sandilands, M. (1995). Introduction to Geological Data Analysis. Blackwell Science.
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) y = c(225, 208, 172, 198, 204, 183, 190, 212, 247, 127, 167, 234, 217, 192, 212, 171, 169, 210, 245, 222, 185, 227, 193, 178, 187, 182, 194, 217, 168, 211, 234, 204, 221, 198, 261, 228, 146, 201, 146, 231) dir_2sample_test_2D(x, y)#> $f #> [1] 12.6 #> #> $fcrit #> [1] 3.96 #> #> $df1 #> [1] 1 #> #> $df2 #> [1] 78 #> #> $p_value #> [1] 0.000658 #> #> $interpretation #> [1] "Reject H0 and conclude that the two samples could not come from the same population with the same mean direction" #>