max

Return the maximum value of the specified field from among all points containing that field.

put|reduce max(field)

Parameter	Description	Required?
field	The field to analyze for the maximum value	Yes

Example

This example uses the batch processor.

// On historical data, you can apply reducer to get a single computation,
// or batch your historical data by time, then reduce per batch period.

sub historical_points() {
  emit -from :0: -limit 10 | put cnt = count(), value = Math.random()
}
historical_points 
| reduce min(cnt), min_val = min(value), max(cnt), max_val = max(value)
| view table 
    -columnOrder "min","min_val","max","max_val"
    -title "Min and max of historical points"
  ;
historical_points 
| batch 5 
| reduce min(cnt), max(cnt) 
| view table
    -columnOrder "min","max" 
    -update "append" 
    -title "Min and max per 5-second batch, historical"
;

// On live streaming data, you must batch by time, then reduce per batch period.

sub live_points() {
  emit -limit 10 | put cnt = count(), value = Math.random()
}
live_points 
| batch 3 
| reduce min(cnt), max(cnt) 
| view table 
  -columnOrder "min","max" -update "append"
  -title "Min and max per 3-second batch, live";