Flux - Pearson of CPUs

pearson.tick

// Calculate the correlation between 2 CPU Usage
cpu0 = from(bucket: "telegraf")
  |> range(start: v.timeRangeStart, stop: v.timeRangeStop)
  |> filter(fn: (r) => r._measurement == "cpu")
  |> filter(fn: (r) => r._field == "usage_idle")
  |> filter(fn: (r) => r.cpu == "cpu0")
  
  
cpu1 = from(bucket: "telegraf")
  |> range(start: v.timeRangeStart, stop: v.timeRangeStop)
  |> filter(fn: (r) => r._measurement == "cpu")
  |> filter(fn: (r) => r._field == "usage_idle")
  |> filter(fn: (r) => r.cpu == "cpu1")
  
pearsonr(x: cpu0, y: cpu1, on: ["_time", "_field"])
  |> keep(columns: ["_value"])
  |> yield(name: "r1")