StDevP
Purpose
Returns the standard deviation of a population represented by a series of non-blank values in a field.
Format
StDevP(field{;field... })
Parameters
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 braces { } are optional.
Data type returned
number
Originated in
FileMaker Pro 6.0 or earlier
Description
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.
•several non-repeating fields in a record (field1;field2;field3...).
•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::field1;table::field2;...). You can include fields from different
tables (table 1::field A;table 2::field B...).
Examples
A portal displays the related values 5, 6, 7, and 8 in the field Scores. StDevP(table::Scores) returns 1.11803398....
In the following examples:
•Field1 contains two repetitions with values of 1 and 2.
•Field2 contains four repetitions with values of 5, 6, 7, and 8.
•Field3 contains four repetitions with values of 6, 0, 4, and 4.
•Field4 contains one repetition with a value of 3.
StDevP(Field4) results in an error because the population standard deviation of a single number is not defined.
StDevP(Field2) returns 1.11803398... for a non-repeating field.
StDevP(Field1;Field2;Field3) returns 2.16024689..., 2.49443825..., 1.5, 2 for repeating fields.
Note When a referenced field is a repeating field, the StDevP function returns the standard deviation of a population in the first repetition fields, then the standard deviation of a population in the second repetition fields, and so on.
Related topics
