viewof selectTimes = Inputs.select(
-
  [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12],
+
  d3.range(0, 24),

  {
    multiple: true,
    label: "Select times (control-click for multiple selections)"
  }
)

// Type code here
Plot.plot({
  marks: [
    Plot.dot(data, {
      x: "temp",
      y: "demand",
      fill: "lightgrey",
      fillOpacity: 0.2,
      r: 2
    }),
    Plot.dot(data, {
-
      filter: (d) => d.hour == selectTimes,
+
      filter: (d) => selectTimes.includes(d.hour),
      x: "temp",
      y: "demand",
      fill: "hour",
      fillOpacity: 0.8,
      r: 3
    })
  ],
  marginLeft: 60
})