Use this function only in a real-time feed to an iWay Enable chart, since a chart is the only control that shows history. All other controls (gauges) show only the latest value.

This function formats its result specifically for an iWay Enable chart. When constructing the feed, you must add the following prefix to preserve the string that the function returns:

asis:

The syntax for the function is:

_EUPDATE(events,aggFunc,hist)

Parameter	Type	Required/ Optional	Description
events	String	Required	Is an array of event names that are delimited by a pipe (|).
aggFunc	String	Required	Specifies the aggregation function. See the table that follows for valid values.
hist	long	Optional	Specifies the amount of real-time data history that will be retrieved (current time minus hist).

The function aggregates the facts saved from an event capture by examining the aggFunc value and determining the corresponding aggregation function, as described in the following table.

aggFunc Value	Aggregation Function
avg	AVG()
min	MIN()
max	MAX()
sum	SUM()
count	COUNT()

The hist parameter groups the aggregation by the hist value. The rules for grouping by aggregation are described in the following table.

hist Value	Aggregation Interval
< 1 sec	Grouped by milliseconds
< 1 min	Grouped by seconds
< 1 hour	Grouped by minutes
< 1 day	Grouped by hours
< 4 weeks	Grouped by days