Legend in biograph plot

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John Doe 2013-5-18

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https://ww2.mathworks.cn/matlabcentral/answers/76258-legend-in-biograph-plot

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I have a biograph object, and I want to "color-code" the edges and vertices.

Is it possible to get legends in the biograph plot, similar to the ones in plot.

My code is:

    Sys = sparse(from_nodes, to_nodes,1,s,s);
    SysTri = tril(Sys + Sys');
    h = view(biograph(SysTri,[],'ShowArrows','off','ShowWeights','off')); 
    %%One of the parts I'm coloring:
    set(h.Nodes(node_list1),'Color',[1 0.4 0.4])
    fowEdges = getedgesbynodeid(h,get(h.Nodes(node_list1),'ID'));
    revEdges = getedgesbynodeid(h,get(h.Nodes(fliplr(node_list1)),'ID'));
    edges = [fowEdges;revEdges];
    set(edges,'LineColor',[1 0 0])
    set(edges,'LineWidth',1.5)

Now, I would like to do something like this:

legend(h,'Node list 1', 'Node list 2');

Does anyone know if this is possible?

Edit: It doesn't need to be an automatic solution, since I'm not doing this very many times. I know I can manually "Print to figure", and "Insert legends" there, but then every single line gets its own label.

Any help is appreciated. Thanks!