Fabric Plot of Vollmer (1990)

Creates a fabric plot using the eigenvalue method

Usage

vollmer_plot(x, ...)

# Default S3 method
vollmer_plot(
  x,
  labels = NULL,
  add = FALSE,
  ngrid = c(5, 5, 5),
  main = "Vollmer diagram",
  guides = NULL,
  ...
)

# S3 method for class 'spherical'
vollmer_plot(
  x,
  labels = NULL,
  add = FALSE,
  ngrid = c(5, 5, 5),
  main = "Vollmer diagram",
  weights = NULL,
  guides = NULL,
  ...
)

# S3 method for class 'list'
vollmer_plot(
  x,
  labels = NULL,
  add = FALSE,
  ngrid = c(5, 5, 5),
  main = "Vollmer diagram",
  guides = NULL,
  ...
)

Arguments

x

spherical object or a three-column matrix, where the first column is P, the second is G, and the third one is R of the Vollmer parameters.

...

optional graphical parameters

labels

character. text labels

add

logical. Should data be plotted to an existing plot?

ngrid

integer or 3-element vector specifying the amount of gridlines for the P, G, and G axes. Constant grid spacing when only one integer is given. NULL when no grid.

main

character. The main title for the plot.

guides

logical. Whether guides should be added to the plot. Defaults to getOption("structr.guides").

weights

numeric. Weightings

Value

plot and when stored as an object, the P, G, and R values as a numeric vector.

References

Vollmer, F. W. (1990). An application of eigenvalue methods to structural domain analysis. Geological Society of America Bulletin, 102, 786<U+2013>791.

See also

vollmer(), ortensor()

Other fabric-plot: flinn_plot(), hsu_plot(), woodcock_plot()

Examples

# Orientation data
set.seed(20250411)
mu <- Line(120, 50)
a <- rvmf(10, mu = mu, k = 10)
vollmer_plot(a, labels = "VMF")

b <- rfb(100, mu = mu, k = 1, A = diag(c(10, 0, 0)))
vollmer_plot(b, labels = "FB", add = TRUE, col = "red")

c <- runif.spherical(n = 100, "Line", method = "rotasym")
vollmer_plot(c, labels = "UNIF", add = TRUE, col = "green")

d <- rkent(100, mu = mu, k = 10, b = 4)
vollmer_plot(d, labels = "KENT", add = TRUE, col = "blue")