RSpectra-compatible eigen shim.

RSpectra-compatible eigen shim.

Usage

eigs(A, k, which = "LM", opts = list(), ...)

Arguments

A

Matrix or eigencore operator.

k

Number of eigenpairs to compute.

which

RSpectra-style target selector.

opts

Compatibility options list; currently accepted for API compatibility and not interpreted directly.

...

Additional arguments passed to eig_partial().

Value

A list compatible with RSpectra::eigs(), including values, vectors, convergence counts, operation counts, certificate diagnostics, and left/right vector fields when available.

Examples

A <- diag(c(5, 4, 3, 2, 1))
A[1, 2] <- 0.5
res <- eigs(A, k = 2, which = "LM")
res$values
#> [1] 5 4