LowerTriangular.test {Matrix} | R Documentation |
LowerTriangular.test
(UpperTriangular.test
) returns
the maximum modulus of the strict upper (lower) triangle of x.
is.LowerTriangular
and is.UpperTriangular
check if
this value is less than a tolerance.
is.LowerTriangular(x, tol = 0) is.UpperTriangular(x, tol = 0) LowerTriangular.test(x) UpperTriangular.test(x)
x |
a numeric or complex matrix. |
tol |
tolerance for the maximum modulus of the elements in the upper (or lower) triangle of the matrix. |
LowerTriangular.test
(UpperTriangular.test
) returns
the maximum modulus of the elements in the strict upper (lower)
triangle of the matrix x
.
is.LowerTriangular
(is.UpperTriangular
) returns a
logical value according to whether the result of
LowerTriangular.test
(UpperTriangular.test
) is less
than or equal to tol
.
x <- hilbert(9) x[row(x) > col(x)] <- 0 is.UpperTriangular(x, tol = 0) UpperTriangular.test(x)