MATLAB: Changing the FontSize of Matlab diagraph plot

graph theoryMATLABplot

Why I can not access any property of FontSize for each nodes in Matlab digraph?
h=figure;
G=digraph(pass_graph);
p=plot(G,'Layout','circle','EdgeLabel',G.Edges.Weight);
p.NodeColor = 'red';
G.Edges.LWidths = 18*G.Edges.Weight/max(G.Edges.Weight);
p.LineWidth = G.Edges.LWidths;
None of the conventional methods I know are working, such as :
fig=gcf;
set(findall(fig,'-property','FontSize'),'FontSize',22)
Or
p=plot(G,'Layout','circle','FontSize',22,'EdgeLabel',G.Edges.Weight);
As a matter of a fact, I don;t see any property for that:
Error using digraph/plot>checkinputnames (line 126)
Expected input number 4 to match one of these strings:
'ArrowSize', 'BusyAction', 'ButtonDownFcn', 'CreateFcn', 'DeleteFcn', 'DisplayName', 'EdgeAlpha', 'EdgeCData',
'EdgeColor', 'EdgeLabel', 'EdgeLabelMode', 'HandleVisibility', 'HitTest', 'Interruptible', 'LineStyle',
'LineWidth', 'Marker', 'MarkerSize', 'NodeCData', 'NodeColor', 'NodeLabel', 'NodeLabelMode', 'Parent',
'PickableParts', 'Selected', 'SelectionHighlight', 'ShowArrows', 'Tag', 'UIContextMenu', 'UserData', 'Visible',
'XData', 'YData', 'Layout', 'Dimension', 'Iterations', 'XStart', 'YStart', 'Direction', 'Sources', 'Sinks',
'AssignLayers'
The input, 'FontSize', did not match any of the valid strings.
Error in digraph/plot (line 80)
args = checkinputnames(args,nameOffset);

Best Answer

GraphPlot does not support changing the fontsize and fontcolor of the text labels.
As a workaround, if you really need the custom text, grab the XData and YData coordinates from the GraphPlot object, do "hold on", and then superimpose their own custom text labels on the figure by using the TEXT function in MATLAB. Refer to the example below for reference:
% Custom colors from parula colormap and custom sizes between 12 and 20 pts
labelColors = parula(length(names));
labelSizes  = randi([12 20], length(names), 1);
p.NodeLabel = {};
% Custom labels
hold on
for i=1:length(names)
    text(p.XData(i), p.YData(i), names(i), 'Color', labelColors(i, :), 'FontSize', labelSizes(i));
end
hold off
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