The VariancePopulation Aggregate defined in Table 51 retrieves the square of the standard deviation. Its behaviour is the same as the StandardDeviationPopulation Aggregate. Unless otherwise indicated, qualities are Good, Calculated.
This calculation is for a full population where the calculation is done on the full set of data. Use VarianceSample to calculate the variance of a subset of the full population (5.4.3.38).
Table 51 – VariancePopulation Aggregate summary
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VariancePopulation Aggregate Characteristics |
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Type |
Calculated |
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Data Type |
Double |
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|
Use Bounds |
None |
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|
Timestamp |
StartTime |
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|
|
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StatusCode Calculations |
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Calculation Method |
Custom Always Good |
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|
Partial |
Set Sometimes If an interval is not a complete interval |
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|
Calculated |
Set Always |
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|
Interpolated |
Not Set |
|
|
Raw |
Not Set |
|
|
Multi Value |
Not Set |
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|
|
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StatusCode Common Special Cases |
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Before Start of Data |
Bad_NoData |
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After End of Data |
Bad_NoData |
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No Start Bound |
No special handing required |
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No End Bound |
No special handing required |
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|
Bound Bad |
No special handing required |
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|
Bound Uncertain |
No special handing required |
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