is.tril: Lower Triangular Matrix Test
In ramify: Additional Matrix Functionality

Determine if a Matrix is Lower Triangular

1	is.tril(x)

x

A matrix

Logical indicating whether the given matrix is lower triangular.

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m <- mat("1, 0, 0, 0; -1, 1, 0, 0; -2, -2, 1, 0; -3, -3, -3, 1")
is.tril(m)
is.tril(eye(3, 5))

ramify documentation built on May 2, 2019, 5:58 a.m.

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