3.1.3 Markov Chains

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  "description": "Markov Chain Process",
  "width": 500,
  "height": 300,
  "data": [
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        },
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          "state": "Rainy",
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    {
      "name": "transitions",
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          "from": "Sunny",
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          "from": "Sunny",
          "to": "Cloudy",
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        },
        {
          "from": "Sunny",
          "to": "Rainy",
          "probability": 0.1
        },
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          "from": "Cloudy",
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          "from": "Rainy",
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          "probability": 0.5
        }
      ]
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  "scales": [
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      "name": "color",
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  "marks": [
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      "type": "rect",
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        "data": "states"
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      "properties": {
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        }
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    },
    {
      "type": "line",
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          "field": "to"
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