spam (version 0.20-3)

isSymmetric: Test if a spam matrix is Symmetric

Description

Efficient function to test if 'object' is symmetric or not.

Usage

isSymmetric.spam(object, tol = 100 * .Machine$double.eps, ...)

Arguments

object

a spam matrix.

tol

numeric scalar >= 0. Smaller differences are not considered, see all.equal.spam.

...

further arguments passed to all.equal.spam.

Value

• logical indicating if object is symmetric or not.

Details

symmetry is assessed by comparing the sparsity structure of object and t(object) via the function all.equal.spam.

See Also

all.equal.spam.

Examples

obj <- diag.spam(2)
isSymmetric(obj)

obj[1,2] <- .Machine$double.eps
isSymmetric(obj)