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Eigenvalues and Eigenvectors of a Set of Vectors

Source: R/ortensor.R
ot_eigen.Rd

Decomposition of Orientation Tensor Eigenvectors and Eigenvalues

Usage

ot_eigen(x, scaled = FALSE, ...)

# S3 method for class 'spherical'
ot_eigen(x, scaled = FALSE, ...)

# S3 method for class 'ortensor'
ot_eigen(x, scaled = FALSE, ...)

Arguments

x

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

scaled

logical. Whether the Eigenvectors should be scaled by the Eigenvalues (only effective if x is in Cartesian coordinates).

...

additional arguments passed to ortensor() (ignored if x is "ortensor" object).

Value

list containing

values

Eigenvalues

vectors

Eigenvectors in coordinate system of x

See also

Other ortensor: ortensor(), strain_shape

Examples

set.seed(20250411)
mu <- rvmf(n = 1)
x <- rfb(100, mu = mu, k = 1, A = diag(c(10, 0, 0)))
x_eigen <- ot_eigen(x)
x_eigen
#> eigen() decomposition
#> $values
#> [1] 0.49189600 0.46921551 0.03888849
#> 
#> $vectors
#> Vector (Vec3) object (n = 3):
#>                x          y          z
#> [1,] -0.04219599  0.5139000  0.8568117
#> [2,]  0.97090542  0.2234159 -0.0861859
#> [3,]  0.23571626 -0.8282464  0.5083755
#> 
plot(x, col = "grey")
points(mu, col = 4)
text(mu, labels = "Mean", col = 4, pos = 4)
points(x_eigen$vectors, col = c(1, 2, 3))
text(x_eigen$vectors, col = c(1, 2, 3), labels = c("E1", "E2", "E3"), pos = 4)