Compute the Cholesky factorization of an adgeMatrix

Computes the upper-triangular Cholesky factor R of a symmetric positive-definite adgeMatrix X such that t(R) %*% R == X. Results are cached by object_id; repeated calls with the same object return the cached factor.

Usage

chol_factor(X)

Arguments

X

An adgeMatrix that is symmetric positive definite.

Value

An amChol object.

Examples

m <- crossprod(matrix(rnorm(16), 4, 4)) + diag(4)
A <- adgeMatrix(m)
fac <- chol_factor(A)
fac
#> amChol [4x4 | strict | source: 20260702132121.033621-1cdf1817:am:30]