Campus Livre
etreeplot
Plots the elimination tree of a sparse matrix.
Category: Mathematics > Sparse Matrices
Syntax
etreeplot(A)Draws the elimination tree of A as a tree diagram.
Description
etreeplot(A) computes etree(A) and displays the result with treeplot. Each node is a column of A, and the line from a node goes up to its parent. It gives a quick picture of how a factorization is organized.
Input arguments
A- Sparse square matrix; only the nonzero pattern matters.
Example
Tree of a tridiagonal matrix
A = sparse(diag(4*ones(6,1)) + diag(ones(5,1),1) + diag(ones(5,1),-1));
etreeplot(A)