Check if a matrix is Lower or Upper triangular {Rfast2}

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)