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Historian SDK

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StdDev Property

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

Syntax

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

Property Value

The time-weighted standard deviation value

Remarks

The value is calculated using time weighted sums (Integrals) and time weighted sums of squares (IntegralOfSquares) values, prorated for any partially contained storage cycles.

For analog tags, similar StdDev values are produced for each cycle.

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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