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Add arrows to edges for directed network graphs #2521
I see an example of a network graph at http://holoviews.org/gallery/demos/bokeh/network_graph.html but the edges between the nodes are missing arrowheads. Is it possible (and preferably easy!) to display the edges as arrows in HoloViews?
I really want to be able to draw directed graphs like the D3 examples at https://bl.ocks.org/cjrd/6863459 and http://bl.ocks.org/rkirsling/5001347. But I'm struggling to find a Python visualization library that will allow me to do this.
I think this would be a very valuable feature.
For a second I was wondering if you could overlay a vectorfield to achieve this. Unfortunately, even if you were to try such a desperate workaround, I don't think you would have access to the concrete layout of the edges to put the little vectors in the right places...