NX Nastran DMAP Programmer's Guide - Kxcad.net

1265
ORTHOG
Generates orthonormal set of vectors
Remark:
ORTHOG generates an orthonormal set of vectors [Q] from a given set of vectors [A]
such that:
[A] = [Q][R]
1 let Rii = -Rii and continue if M is not at least a positive
semi-definite matrix. R contains the partitioning vector
ORTHEPS Output-real-no default. Level of orthogonality. ORTHEPS is the
largest lower triangular term of the matrix R and is computed with
the Householder method.
ORTHREPT Input-real-default=0.707. Matrix Modified Gram-Schmidt algorithm
repeat flag. The default is approximately the square root of 0.5.
ORTHTOL Input-real-default=0.0. Linear dependence tolerance. By default,
ORTHTOL is set to the square root of the minimum machine value.
and if [M] is not given: [Q] T [M] [Q] = [I]
or if [M] is not given: [Q] T [Q] = [I]
where [I] is an identity matrix.