Functions Reference

Aggregate functions
F
ILEMAKER FUNCTIONS REFERENCE 34
Variance
Purpose
Returns the variance of a sample represented by a series of non-blank values in a field.
Format
Variance(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 7.0
Description
The variance of a distribution is a measure of how spread out the distribution is. 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...).
Variance
x
1
2
x
2
2
 x
n
2
+++
n1–
--------------------------------------------
x
1
x
2
 x
n
+++
2
nn 1–
---------------------------------------------------
–=