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PIPointSummaries Method (IListAFTimeIntervalDefinition, Boolean, AFSummaryTypes, AFCalculationBasis, AFTimestampCalculation)

Returns several summaries for each specified interval and range.

Namespace:  OSIsoft.AF.PI
Assembly:  OSIsoft.AFSDK (in OSIsoft.AFSDK.dll) Version:
public IDictionary<AFSummaryTypes, AFValues> Summaries(
	IList<AFTimeIntervalDefinition> intervalDefinitions,
	bool reverseTime,
	AFSummaryTypes summaryType,
	AFCalculationBasis calcBasis,
	AFTimestampCalculation timeType


Type: System.Collections.GenericIListAFTimeIntervalDefinition
The list of time interval definitions used to produce the summary. The Range of each time interval definition within the list must be in consecutive order to produce the expected result. Any overlaps or gaps in the intervals will be ignored.
Type: SystemBoolean
If set to , the results in each collection of AFValues will be returned in reverse order.
Type: OSIsoft.AF.DataAFSummaryTypes
A flag which specifies one or more summaries to compute for each interval over the time range
Type: OSIsoft.AF.DataAFCalculationBasis
Specifies the method of evaluating the data over the time range.
Type: OSIsoft.AF.DataAFTimestampCalculation
A flag indicating what how to calculate a time stamp for each interval.

Return Value

Type: IDictionaryAFSummaryTypes, AFValues
A dictionary of AFValues, indexed by the specific AFSummaryTypes.
ArgumentOutOfRangeException The summaryType cannot be None.
PIExceptionError returned by the PI Data Archive.

Time-weighted totals are computed by integrating the rate tag values over the requested time range. If some of the data are bad in the time range, the calculated total is divided by the fraction of the time period for which there are good values. Mathematically, this approach is equivalent to assuming that during the period of bad data, the tag takes on the average values for the entire calculation time range. The use can use the PercentGood summary to determine if the calculation results are suitable for the application's purposes.

Note Notes to Callers
This method, property, or class is only available in the .NET 4 version of the SDK.

Version Information


Supported in: 2.10.5, 2.10, 2.9.5, 2.9, 2.8.5, 2.8, 2.7.5, 2.7, 2.6, 2.5
See Also
Enabling Operational Intelligence