我在Vega中的分区转换是否正确，因为可视化的图形不准确

{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "description": "A simple bar chart with time-based partitioning.",
  "data": [
    {
      "name": "table",
      "values": [
        {"time": "2021-01-01", "value": 10},
        {"time": "2021-01-02", "value": 20},
        {"time": "2021-01-03", "value": 30}
      ]
    }
  ],
  "signals": [
    {
      "name": "bins",
      "value": 3,
      "bind": {"input": "range", "min": 1, "max": 10, "step": 1}
    }
  ],
  "scales": [
    {
      "name": "xscale",
      "type": "band",
      "range": "width",
      "domain": {"data": "table", "field": "time"},
      "padding": 0.1
    },
    {
      "name": "yscale",
      "type": "linear",
      "range": "height",
      "nice": true,
      "zero": true,
      "domain": {"data": "table", "field": "value"}
    }
  ],
  "axes": [
    {"orient": "bottom", "scale": "xscale"},
    {"orient": "left", "scale": "yscale"}
  ],
  "marks": [
    {
      "type": "rect",
      "from": {"data": "table"},
      "encode": {
        "enter": {
          "x": {"scale": "xscale", "field": "time"},
          "y": {"scale": "yscale", "value": 0},
          "width": {"scale": "xscale", "band": 1},
          "height": {"scale": "yscale", "field": "value"}
        }
      }
    }
  ]
}