Remove duplicate edges of undirected graph
조회 수: 13 (최근 30일)
이전 댓글 표시
I am trying to remove duplicated edges of a garph.
I was able to get the unique edges by using
unique(G2.Edges.EndNodes)
However, this code only returns the unique edges without updating the G2.Edges table nor removing edges from the graph.
Any suggestion will be appreciated. Thanks.
My edges table look like this:![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1072625/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1072625/image.png)
댓글 수: 0
채택된 답변
Steven Lord
2022년 7월 21일
Call simplify on your multigraph (you can tell if your graph or digraph is a multigraph using ismultigraph) to convert it to a simple graph.
s = [1 1 1 1 1 2 2 3 3 3 3 5 5];
t = [2 3 4 4 6 1 5 4 4 5 6 4 6];
names = string(1:6);
multiGraph = graph(s, t);
check = ismultigraph(multiGraph)
simpleGraph = simplify(multiGraph);
Let's compare how they look.
figure
h = plot(multiGraph);
title('multigraph');
figure
% Plot the simple graph with the vertices in the same location
% as the vertices in the multigraph
plot(simpleGraph, 'XData', h.XData, 'YData', h.YData)
title('simplegraph')
댓글 수: 0
추가 답변 (1개)
Chunru
2022년 7월 21일
% A graph with duplicated edges
s = [1 1 1 1 1 2 2 3 3 3 3 5 5];
t = [2 3 4 4 6 1 5 4 4 5 6 4 6];
names = string(1:6);
G = graph(s, t);
% A new graph with unique edges
G.Edges;
G1 = graph(unique(G.Edges)); % Create a new graph based on the unique edge rather than updating
subplot(121);
h1 = plot(G);
subplot(122)
h2 = plot(G1);
댓글 수: 3
Chunru
2022년 7월 21일
If you have node names specified, such as:
% A graph with duplicated edges
s = [1 1 1 1 1 2 2 3 3 3 3 5 5];
t = [2 3 4 4 6 1 5 4 4 5 6 4 6];
names = string(1:6);
G = graph(s, t, [], names);
% A new graph with unique edges
G.Edges % EndNodes
% Using string array for unique (rather cell array)
newEdges = cellstr(unique(string(G.Edges.EndNodes), 'row'));
EdgeTable = table(newEdges, 'VariableNames', {'EndNodes'});
G1 = graph(EdgeTable); % Create a new graph based on the unique edge rather than updating
subplot(121);
h1 = plot(G);
subplot(122)
h2 = plot(G1);
참고 항목
카테고리
Help Center 및 File Exchange에서 Graph and Network Algorithms에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!