Highlighting edges of a graph
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How do I highlight specific edges of a graph? Let's say for the figure given below, I need to highlight the edges 9-16 and 8-15. Please help.
回答（3 个）
Luciano Garim
2020-10-7
0 个投票
Hi Hari!
I had the same problem. I found the solution here:
https://www.mathworks.com/help/matlab/ref/matlab.graphics.chart.primitive.graphplot.highlight.html
Try these examples above. If you have any difficulty let me know.
I hope helped you!
Ameer Hamza
2020-10-7
编辑：Ameer Hamza
2020-10-7
You can give them a different color and sizes. Here is a simple example
n = 20;
G = graph(1:n, [2:n 1]);
plot(G)
nodes = [5 7 9 11]; % nodes to highlight
colors = [0 0 0; % color for normal nodes
1 0 0]; % color for highlighted nodes
ax = axes();
colormap(colors);
gp = plot(G);
gp.NodeCData = zeros(1, n);
gp.NodeCData(nodes) = 1;
gp.MarkerSize = gp.MarkerSize*ones(1, n);
gp.MarkerSize(nodes) = 10;
4 个评论
Hari
2020-10-7
Ameer Hamza
2020-10-7
Same method apply for edges too
n = 20;
G = graph(1:n, [2:n 1]);
m = size(G.Edges, 1);
nodes = [5 7 9 11]; % nodes to highlight
edges = [1 6 9 14];
colors = [0 0 0; % color for normal nodes
1 0 0]; % color for highlighted nodes
ax = axes();
colormap(colors);
gp = plot(G);
gp.NodeCData = zeros(1, n);
gp.NodeCData(nodes) = 1;
gp.MarkerSize = gp.MarkerSize*ones(1, n);
gp.MarkerSize(nodes) = 10;
gp.EdgeCData = zeros(1, m);
gp.EdgeCData(edges) = 1;
gp.LineWidth = 1*ones(1, m);
gp.LineWidth(edges) = 3;
Hari
2020-10-7
Ameer Hamza
2020-10-7
No, MATLAB's graph() uses its own internal numbering for edges. If you want to specify edges using the nodes, then try the following code. It specifies nodes at two ends of the edge you want to highlight.
n = 20;
G = graph(1:n, [2:n 1]);
m = size(G.Edges, 1);
nodes = [5 7 9 11]; % nodes to highlight
edges_source = [1; 4; 7; 10];
edges_destination = [2; 5; 8; 11]; % an edge must exist between corresponding nodes of two vectors
edges = G.findedge(edges_source, edges_destination);
colors = [0 0 0; % color for normal nodes
1 0 0]; % color for highlighted nodes
ax = axes();
colormap(colors);
gp = plot(G);
gp.NodeCData = zeros(1, n);
gp.NodeCData(nodes) = 1;
gp.MarkerSize = gp.MarkerSize*ones(1, n);
gp.MarkerSize(nodes) = 10;
gp.EdgeCData = zeros(1, m);
gp.EdgeCData(edges) = 1;
gp.LineWidth = 1*ones(1, m);
gp.LineWidth(edges) = 3;
Steven Lord
2020-10-7
The easiest way for this example is to specify the source and target nodes. Let's plot the bucky graph:
G = graph(bucky);
h = plot(G);
To highlight edge (9, 10) and (29, 43) in red, we specify the source nodes [9 29] and the corresponding target nodes [10 43] as the second and third inputs to highlight. We then tell highlight we want to change the EdgeColor property of those edges to red.
highlight(h, [9 29], [10 43], 'EdgeColor', 'r')
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2020-10-7
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