I'm trying to produce a plot of a directed graph. Hence, I'd like to plot an arrow from one node to another. Is it possible to do this on Vega-Lite? And if yes, then how so?
There is no support for arrows on line segments in Vega-Lite. You can see the open feature request here: https://github.com/vega/vega-lite/issues/4270
For some applications, it might be suitable to annotate charts with unicode arrows; here is a brief example ( open in editor ):
{
"data": {
"values": [{"x": 1, "y": 2}, {"x": 2, "y": 4}]
},
"mark": {"type": "text", "angle": -45, "dx": -20, "fontSize": 35},
"encoding": {
"text": {"value": "➟"},
"x": {"field": "x", "type": "quantitative"},
"y": {"field": "y", "type": "quantitative"}
}
}
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