How to make complete graph from co-ordinates.

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Ashish Verma
Ashish Verma 2021-8-12
评论： Walter Roberson 2021-8-12
x=[0.3 ,5.6 , -8.4,6.4 ] % These are my x-cordinates
y=[4.6, 6.9,3.6,7.89]% These are my y-cordinates
I want to plot complete undirected graph with edge weight in between nodes.

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Chunru
Chunru 2021-8-12
编辑：Chunru 2021-8-12
Ran in:
Show the node name, edge weight/distance, and node coordinates
x=[0.3 ,5.6 , -8.4,6.4 ]; % These are my x-cordinates
y=[4.6, 6.9,3.6,7.89]; % These are my y-cordinates
n = length(x);
g = graph(ones(n,n), 'omitselfloops'); % complete graph
g.Edges.Weight = zeros(size(g.Edges.EndNodes, 1),1);
% edge distance
for i=1:size(g.Edges, 1)
g.Edges.Weight(i) = norm([x(g.Edges.EndNodes(i,2))-x(g.Edges.EndNodes(i,1)) ...
y(g.Edges.EndNodes(i,2))-y(g.Edges.EndNodes(i,1))]);
end
g.Nodes.Name=["A", "B", "C", "D"]'; % node name
%g.Edges.Weight = randi([20,90], [6,1]); % weigth %[1:6]'
h = plot(g, 'NodeLabel',g.Nodes.Name,'EdgeLabel',g.Edges.Weight);
h.XData = x;
h.YData = y;
  2 个评论
Ashish Verma
Ashish Verma 2021-8-12
Thank sir, but i want to show weight of edges too and instead of node 1,2,3,4 i want to give some name like 'A', 'B' and so on.
Chunru
Chunru 2021-8-12
Those numbers are weight not node number. Weight are some random number now.

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更多回答（3 个）

Walter Roberson
Walter Roberson 2021-8-12
Ran in:
x=[0.3 ,5.6 , -8.4,6.4 ] % These are my x-cordinates
x = 1×4
0.3000 5.6000 -8.4000 6.4000
y=[4.6, 6.9,3.6,7.89]% These are my y-cordinates
y = 1×4
4.6000 6.9000 3.6000 7.8900
nx = length(x);
CG = ones(nx, nx);
CG(1:nx+1:end) = 0;
G = graph(CG)
G =
graph with properties: Edges: [6×2 table] Nodes: [4×0 table]
plot(G, 'XData', x, 'YData', y)
  5 个评论
显示 3更早的评论
Ashish Verma
Ashish Verma 2021-8-12
If co-ordintes are given then the distance between the points are fixed,we can not asign any random distances between the nodes.
Walter Roberson
Walter Roberson 2021-8-12
Ran in:
x =[0.3 ,5.6 , -8.4,6.4 ] % These are my x-cordinates
x = 1×4
0.3000 5.6000 -8.4000 6.4000
y =[4.6, 6.9,3.6,7.89]% These are my y-cordinates
y = 1×4
4.6000 6.9000 3.6000 7.8900
dists = squareform(pdist([x(:), y(:)]));
[s, t, w] = find(dists);
G = graph(s, t, round(w,2));
G.Nodes.Names = {'A', 'B', 'C', 'D'}.';
plot(G, 'XData', x, 'YData', y, 'EdgeLabel', G.Edges.Weight, 'NodeLabel', G.Nodes.Names);

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Ashish Verma
Ashish Verma 2021-8-12
Sir, sorry for saying weight i must say distances between the points.
Ashish Verma
Ashish Verma 2021-8-12
Sir,i dont want to put any random weight. For example take two elements from x (0.3 , 5.6) and y(4.6 , 6.9) then distances between the points will be sqrt((4.6-0.3)^2 + (6.9-5.6)^2) = 4.49.

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