Is it possible to write Latex on Vega-Lite?

Question

I'd like to use the "text" mark with a Latex expression and plot it using Vega-Lite. Is this possible? For example:

data = {x:[0,1,2,3],y:[0,1,2,3],t=["x^0","x^1","x^2","x^3"]}
{
  "data":data
  }],
  "mark": "text",
  "encoding": {
    "x": {"field": "x", "type": "quantitative"},
    "y": {"field": "y", "type": "quantitative"},
    "text": {"field": "t", "type": "nominal"}
  }
}

Answer 1

No, Vega-Lite specifications do not support LaTeX math (the relevant feature request is here ). But for simple mathematical expressions like the one in your example, you can often represent them using unicode text:

{
  "data":{
    "values": [
      {"x": 0, "t": "x⁰"},
      {"x": 1, "t": "x¹"},
      {"x": 2, "t": "x²"},
      {"x": 3, "t": "x³"}
    ]
  },
  "mark": "text",
  "encoding": {
    "x": {"field": "x", "type": "quantitative"},
    "y": {"field": "x", "type": "quantitative"},
    "text": {"field": "t", "type": "nominal"}
  }
}