Syntax

Description

p = etree(A)returns an elimination tree for the square symmetric matrix whose upper triangle is that ofA.p(j)is the parent of columnjin the tree, or0ifjis a root.

p = etree(A,'col')returns the elimination tree ofA'*A.

p = etree(A,'sym')is the same asp = etree(A).

[p,q] = etree(...)also returns a postorder permutationq的树。

See Also

etreeplot|treelayout|treeplot