Eigendecomposition for adgeMatrix

Compute eigenvalues and eigenvectors of an adgeMatrix, dispatching through the amatrix backend for symmetric matrices when GPU acceleration is available. A fallback method for plain matrix preserves base R behaviour after the generic is promoted to S4.

Usage

# S4 method for class 'adgeMatrix'
eigen(x, symmetric, only.values = FALSE, EISPACK = FALSE)

Arguments

x

An adgeMatrix or plain matrix.

symmetric

Logical indicating whether x is symmetric. When missing, symmetry is detected automatically from the host copy.

only.values

Logical; if TRUE only eigenvalues are returned.

EISPACK

Ignored; retained for signature compatibility.

Value

A list with components values (numeric vector) and vectors (matrix, omitted when only.values = TRUE).

Examples

S <- adgeMatrix(crossprod(matrix(rnorm(9), 3, 3)))
ev <- eigen(S, symmetric = TRUE)
length(ev$values)
#> [1] 3