I used GraphPlot to create a graph but some node labels are on top of edges. Is it possible to change the label positions? If not, are there any alternatives to create visually appealing graphs?
MATLAB: Is it possible to change the position of graph plot node labels
graphgraph theorylabel;nodeplotposition;
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There are lots of ways to do this. Here's a simple approach that uses labelpoints from the file exchange instead of labeling the nodes with the NodeLabel property. The labelpoints function is just a wrapper to the text() function that makes positioning of the text a little easier.
% Remove NodeLabels
plt.NodeLabel = {}; % Define upper and lower labels (they can be numeric, characters, or strings)
upperLabels = 1:numel(plt.XData);lowerLabels = [0.12;0.13;1.24;10.24;2.3;4.56;1.00]; % label each node and offset the labels in the North and South directions.
% You can play around with this offset values ------vvv
labelpoints(plt.XData, plt.YData, upperLabels, 'N', 0.3);labelpoints(plt.XData, plt.YData, lowerLabels, 'S', 0.3);
If there were a way to access the handles to the node label text objects, it would be easy to draw rectangels (or circles) around the labels. But I am not aware of such a method.
An alternative is to remove the node labels and add them back in as text objects. Then we would have the handles to the text objects and their coordinates, extent, etc. The demo below demonstrates how to do this. Note that this comes at a cost. The text objects acting as node labels are no longer associated with the nodes. So, if there's a change in the graph that causes a rearrangement of the nodes, the text objects will not follow.
% Create graph and plot it
A = triu(magic(4));names = {'alpha' 'beta' 'gamma' 'delta'};G = graph(A,names,'upper','omitselfloops');h = plot(G);% Store a copy of node labels, then remove the labels
NodeLabels = h.NodeLabel; h.NodeLabel = repmat({''},size(h.NodeLabel)); % Add text objects for the labels.
% * You may have to adjust the HorizontalAlignment & VerticalAlignment to suit your needs
buffer = range(xlim())*0.02; text(h.XData + buffer, h.YData, NodeLabels, 'HorizontalAlignment', 'Left', ... 'VerticalAlignment', 'Middle', 'EdgeColor', 'k', 'FontSize', h.NodeFontSize, ... 'Color', 'k', 'FontName', h.NodeFontName);Note that you can also set the BackgroundColor of the text objects.
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