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Historian SDK

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Average Property

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Gets or sets the time-weighted average value of retrieval cycle.

Syntax

'Declaration
 
Public Property Average As Double
'Usage
 
Dim instance As AnalogSummaryQueryResult
Dim value As Double
 
instance.Average = value
 
value = instance.Average
public double Average {get; set;}
public:
property double Average {
   double get();
   void set (    double value);
}

Property Value

The time-weighted average value of the retrieval cycle.

Remarks

This is calculated by using the individual summary averages. The calculation is:

Sum(average * delta t) / Total time of average in all cycles

For analog tags, the calculation is:

Sum(value * delta t) / Total time

Delta t is prorated for any partially contained storage cycles.

This is like the values returned by an Average query against the History table for a cycle of the same length, where the History row DateTime is the same as the EndDateTime.

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also

Reference

AnalogSummaryQueryResult Class
AnalogSummaryQueryResult Members

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