MATLAB: Change font size of node name in a graph

font size of node namesgraph theory

Hello,

Is there any one knows how to change the font size of node name in a graph, please!

I see that we can change many graphical characteristics by using the option 'Edit', but I can not find any option to change the font size of node names.

Could you help me, please!

Thanks,

Khuyen

Best Answer

Several new properties were added to GraphPlot objects in R2018b to enable customization of node and edge labels. In particular you can change the font size with the NodeFontSize and EdgeFontSize properties.

A list of all the properties is here: GraphPlot Properties

Example:

G = graph([1 1 1 1 5 5 5 5],[2 3 4 5 6 7 8 9]);
h = plot(G,'NodeLabel',{'A','B','C','D','E','F','G','H','I'});
h.NodeFontSize = 14;

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MATLAB: Change the alignment and font size of edgelabels

The edge labels provided with the plot of a graph can't be modified in terms of their alignment. However, you can add standard text elements, which have more options, in the middle of each edge:

s = [1 1 1 2 2 3 3 4 4 5 6 7];
t = [2 3 4 5 6 5 7 6 7 8 8 8];
G = digraph(s,t);
eLabels = {'textx' 'texty' 'textz' 'texty' 'textz' 'textx' 'textz' 'textx' 'texty' 'textz' 'texty' 'textx'};
nLabels = {'{0}','{x}','{y}','{z}','{x,y}','{x,z}','{y,z}','{x,y,z}'};
h=plot(G,'Layout','force');
[sSorted, tSorted] = findedge(G);
midEdgeX = (h.XData(sSorted) + h.XData(tSorted))/2;
midEdgeY = (h.YData(sSorted) + h.YData(tSorted))/2;
edgelabel = [];
for ii=1:length(eLabels)
    [sii, tii] = findedge(G, ii);
    
    edgelabel(ii) = text(midEdgeX(ii), midEdgeY(ii), eLabels(ii), 'HorizontalAlignment', 'right');
end

See the doc page of text for more options.

MATLAB: How to change FontSize and FontWeight of labels using labeledge

Hi Simone,

You can change the FontSize and FontWeight of edge labels using GraphPlot Properties

In your case for example,

s = [1 1 2 2 3];
t = [2 3 3 4 4];
G = graph(s,t);
h = plot(G);
labelText = {'ABC' 'DEF' 'GHI'};
labeledge(h,[1 1 2],[2 3 3],labelText)
h.EdgeFontSize = 14;
h.EdgeFontWeight = 'Bold';

Best Answer

Related Solutions

MATLAB: Change the alignment and font size of edgelabels

MATLAB: How to change FontSize and FontWeight of labels using labeledge

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