StDevReturns the standard deviation of the sample represented by a series of non-blank values in a field.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.Field can be any of the following:

• a repeating field (repeatingField).

• a field in matching related records specified by (table::field), whether or not these records appear in a portal.

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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.

• 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...).A portal displays the related values 5, 6, 7, and 8 in a field called Scores. StDev(table::Scores) returns 1.29099444....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.Note When a referenced field is a repeating field, the StDev function returns the standard deviation in the first repetition fields, then the standard deviation in the second repetition fields, and so on.

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