How can I keep the coordinates of a graph's nodes unchanged after removing a specific edge?

Question

Asaf McRock 2020-12-13

1
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https://ww2.mathworks.cn/matlabcentral/answers/692345-how-can-i-keep-the-coordinates-of-a-graph-s-nodes-unchanged-after-removing-a-specific-edge

评论： Ameer Hamza 2020-12-13

采纳的回答： Ameer Hamza

在 MATLAB Online 中打开

Hello,

I'm using the following built in function:

Tf=rmedge(G,edge); %Variable edge here is chosen randomly.

to remove an edge (link) from a graph. How can I keep the coordinates of G's nodes unchanged after removing that link?

Kindly see the attached two pictures to have a better visualization of what I'm looking for.(I'm removing the link between nodes 4 and 6).

Many thanks!

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Answer 1

Ameer Hamza 2020-12-13

2
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https://ww2.mathworks.cn/matlabcentral/answers/692345-how-can-i-keep-the-coordinates-of-a-graph-s-nodes-unchanged-after-removing-a-specific-edge#answer_573835

在 MATLAB Online 中打开

You can use the XData and YData property of the graphPlot object to fix their position. Check the following example

G = digraph(1,2:5);
G = addedge(G,2,6:15);
G = addedge(G,15,16:20);
subplot(2,2,1);
Gh = plot(G);
x = Gh.XData;
y = Gh.YData;
rand_edge = randi([1 10]);
G_new = rmedge(G, rand_edge);
subplot(2,2,2);
Gh_new1 = plot(G_new); % changed position of the removed node
subplot(2,2,3);
Gh_new2 = plot(G_new, 'XData', x, 'YData', y); % edge removed but nodes at same position