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| Contents > Functions reference (alphabetical list) > Aggregate functions > StDev function |
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| StDev function |
| Format |
StDev(field{;field...}) |
| Parameter |
| field - any related field, repeating field, or set of non-repeating fields; or an expression that returns a field, repeating field, or set of non-repeating fields. |
| Parameters in curly braces { } are optional. |
| Data type returned |
| number |
| Description |
| Returns the standard deviation of the sample represented by a series of non-blank values in: |
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a repeating field (repeatingField). |
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a field in matching related records specified by (table::field), whether or not these records appear in a portal. |
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several non-repeating fields in a record (field1;field2;field3). |
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corresponding repetitions of repeating fields in a record (repeatingField1;repeatingField2;repeatingField3), if the result is returned in a repeating field with at least the same number of repeats. |
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several fields in the first matching record specified by (table 1::field A, table 2::field B,...). You can name a different table for each field (table 1::field A;table 2::field B...). |
| Examples |
| A portal displays the related values 5, 6, 7, and 8 in a field called Scores. StDev(table::Scores) returns 1.29099444.... |
| In the following examples: |
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Field1 contains two repetitions with values of 1 and 2. |
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Field2 contains four repetitions with values of 5, 6, 7, and 8. |
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Field3 contains four repetitions with values of 6, 0, 4, and 4. |
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Field4 contains one repetition with a value of 3. |
| StDev(Field4) results in an error because standard deviation of a single number is not defined. |
| StDev(Field1;Field2;Field3) returns 2.64575131..., 3.05505046..., 2.12132034..., 2.82842712... for a repeating field. |
| Related topics |
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Functions reference (category list) |
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Functions reference (alphabetical list) |
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About formulas |
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About functions |
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Defining calculation fields |
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Using operators in formulas |
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| Contents > Functions reference (alphabetical list) > Aggregate functions > StDev function |
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