Skip to contents

Fabric intensity and shape indices

Source: R/fabric_plots.R
fabric_indexes.Rd

Fabric intensity and shape indices

Usage

fabric_indexes(x)

Arguments

x

object of class "ortensor", "ellipsoid", or "Vec3", "Line", "Ray", or "Plane", where the rows are the observations and the columns are the coordinates.

Value

numeric vector containing the fabric shape and intensity indices:

P

Point (Vollmer 1990). Range: (0, 1)

G

Girdle (Vollmer 1990). Range: (0, 1)

R

Random (Vollmer 1990). Range: (0, 1)

B

Cylindricity (Vollmer 1990). Range: (0, 1)

C

Cylindricity or Fabric strength (Woodcock 1977). Range: (0, Inf)

I

Cylindricity or Fabric intensity (Lisle 1985). Range: (0, 5)

D

"Distance" from uniformity, linear from R to P, and R to G (Vollmer 2020). Range: (0, 1). End members are: uniform D = 0, girdle D = 0.5, cluster D = 1. The 99% level for a test against uniformity for a sample size of 300 is D = 0.1.

See also

shape_params()

Examples

set.seed(20250411)
mu <- Line(120, 50)
x <- rvmf(100, mu = mu, k = 1)
fabric_indexes(x)
#>          P          G          R          B          C          I          D 
#> 0.13716550 0.06777223 0.79506227 0.20493773 0.49800008 1.12478369 0.15687782