matlab - Matlab的Graphviz：删除没有边的节点

Question

我正在将 Graphviz 用于 matlab。有没有办法删除最终图中没有边的节点，因为我的图非常大（~9100 个节点），并且以更好的方式表示图的任何其他帮助将不胜感激。

Answer 1

的输入graphviz是邻接矩阵，因此您可以执行以下操作：

% Generate random adjacency matrix with no nodes connected to themselves
N = 10; 
adj = (randi(N, N) > 5) .* (ones(N) - eye(N));

% Spuriously set one row and column to zero: no connections for this node
adj(:, 2) = 0; adj(2, :) = 0;

% Find the nodes with no edges
noEdgeNodes = all(adj == 0, 1) & all(adj == 0, 2)'

noEdgeNodes =

 0     1     0     0     0     0     0     0     0     0

% Remove nodes with no edges
adj(noEdgeNodes, :) = []; 
adj(:, noEdgeNodes) = [];

% Call graphviz
graphViz4Matlab('-adjMat', adj, '-nodeLabels', ...
    arrayfun(@(x){num2str(x)}, 1:size(adj, 1)))