is.lower.tri: Check if a matrix is Lower or Upper triangular

In Rfast2: A Collection of Efficient and Extremely Fast R Functions II

Check if a matrix is Lower or Upper triangular

Description

Lower/upper triangular matrix.

Usage

is.lower.tri(x, diag = FALSE)
is.upper.tri(x, diag = FALSE)

Arguments

x	A matrix with data.
diag	A logical value include the diagonal to the result.

Value

Check if a matrix is lower or upper triangular. You can also include diagonal to the check.

Author(s)

Manos Papadakis.

R implementation and documentation: Manos Papadakis [e-mail].

See Also

Intersect

Examples

x <- matrix(runif(10*10),10,10)

is.lower.tri(x)
is.lower.tri(x,TRUE)


is.upper.tri(x)
is.upper.tri(x,TRUE)

Rfast2 documentation built on Aug. 8, 2023, 1:11 a.m.