Change label font in Graph plots

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Alexander Shtof
Alexander Shtof on 17 Jul 2016
Commented: Bakht Zaman on 16 Nov 2016
I am plotting a Graph object (created using the graph function). I figured out how to label nodes and edges in my graph, but I do not know how to change the font size and weight for the label text. How can it be done?

Answers (1)

Star Strider
Star Strider on 17 Jul 2016
You can change the node labels (that I assume you are referring to) by using a text object.
This code is from the documentation for graph, with my tweaks to change the node label font size:
s = [1 1 1 2 2 3 3 4 5 5 6 7];
t = [2 4 8 3 7 4 6 5 6 8 7 8];
weights = [10 10 1 10 1 10 1 1 12 12 12 12];
names = {'A' 'B' 'C' 'D' 'E' 'F' 'G' 'H'};
G = graph(s,t,weights,names);
figure(1)
h = plot(G,'EdgeLabel',G.Edges.Weight);
nl = h.NodeLabel;
h.NodeLabel = '';
xd = get(h, 'XData');
yd = get(h, 'YData');
text(xd, yd, nl, 'FontSize',20, 'FontWeight','bold', 'HorizontalAlignment','left', 'VerticalAlignment','middle')
The plot:

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