How to make complete graph from co-ordinates.

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.

Answer 1

[Chunru]

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;

[Ashish Verma]

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]

Those numbers are weight not node number. Weight are some random number now.

Answer 2

[Walter Roberson]

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)

[Ashish Verma]

Thank you so much 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.

[Walter Roberson]

https://www.mathworks.com/help/matlab/math/add-graph-node-names-edge-weights-and-other-attributes.html

G.Edges.Weight = (a column vector);

plot(G, 'XData', x, 'YData', y, 'EdgeLabel', G.Edges.Weight)

[Walter Roberson]

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.Nodes.Names = {'A', 'B', 'C', 'D'}.';
G.Edges.Weight = round(rand(height(G.Edges),1),2);  %use real data here!
plot(G, 'XData', x, 'YData', y, 'EdgeLabel', G.Edges.Weight);

[Ashish Verma]

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]

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);

Answer 3

[Ashish Verma]

Sir, sorry for saying weight i must say distances between the points.

Answer 4

[Ashish Verma]

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.