Adding a legend to a Graph in Matlab

I'd like to add a legend in my Graph without dividing it in several graphs (which is the suggestion made in Legend in a Graph - MATLAB Answers - MATLAB Central (mathworks.com)).

My graph is this one:

I've generated it using plot() and highlight() (for different shapes and colours of nodes of interest). I'd like to generate a legend with the different shapes and colors, because they represent different groups of people but they are part of the same graph. I tried using text() but it's not what I'm looking for as I can't generate a legend with the symbols and colors.

Answer 1

[Bjorn Gustavsson]

Would something like:

legend([h(idx1(1)),h(idx1(2)),h(idx3(1))],...
    'label1','label2','label3')

work for this case. Here I have set the output from your call to plot to h and the three (?) different highlights to be done with something like this:

highlight(h,idx1,etc..)
highlight(h,idx2,etc..)
highlight(h,idx3,etc..)

HTH