Software Venture Consulting

FileMaker Pro downloads & Resources
FileMaker Custom Functions
FileMaker Web Viewer Examples
FileMaker Pro & Lasso Consulting
FileMaker Books
FileMaker Articles
FileMaker Error Reference

Free Web Tools
Free FileMaker Tools

Personal Pages

Shopping Cart
Shopping Cart


Free Newsletter


Privacy Policy

FileMaker is a registered trademark of FileMaker, Inc. in the U.S. and other countries.


 FileMaker Pro Custom Functions

List  |  Show Random  |  Upload  |  Add This to Your Site

ValStdDevS( ValueList ; ArithMeanValue )

Rate this function:  

  Average rating: 4.3  (20 votes)
  Discuss this Custom Function

Bill Thurmes, Miyota Development Center of America

Gives the standard deviation of a sample, where the set of numbers are in a value list

Sample Input:
ValStdDevS ( "5¶8¶24¶3¶6" ; ValueMean ( "5¶8¶24¶3¶6" ) )
ValStdDevS ( "5" ; ValueMean ( "5¶8¶24¶3¶6" ) )
ValStdDevS ( "5¶a¶24¶3¶6" ; ValueMean ( "5¶a¶24¶3¶6" ) )
Sample Output:
? --> divides by N-1; N=1; so, divide by 0
9.44986... ['a' resolves as 0]

 Then copy & paste into FileMaker Advanced's Edit Custom Function window.

Click here to copy To Clip Manager if you have myFMbutler's Clip Manager installed


The native StDev function in FileMaker only works on fields, but it is often more efficient to work with value lists and do all calculations in memory. This is particularly true when you use ESQL, where the answer is returned as a value list. The ValStdDevS function gives the standard deviation of a set of numerical values in a ¶-delimited value list. This uses the square root of (the sum of squares divided by N-1); for some uses, ValStdDev (which uses N) is more appropriate. One caveat: if a non-numerical value is used, it is evaluated as 0.

Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it


There are no comments yet. Be the first to post a comment about this Custom Function! Please try to keep it brief & to the point. Anyone can post:

Your Name:
characters left. If you paste in more than 1500 characters, it will be truncated. Discuss the function - advertisements and other useless posts will be deleted.
Answer 4 + 7 =
Search for Custom Functions:

Custom Functions Widget
Download the Custom Function Dashboard Widget for OS X
Keep all the latest Custom Functions right at your fingertips!

Newest Custom Functions:

1. ExcludeValues(MyList ; Out)
  (Wed, Mar 21, 7:23am)
2. PreviousMonthEndDate ( myDate )
  (Wed, Mar 07, 3:35am)
3. PreviousMonthName (myDate)
  (Wed, Mar 07, 3:33am)
4. FmTableFields ( tableName ; fieldsInclude ; fieldsExclude ; classExclude ; typeExclude ; prefixExclude )
  (Fri, Mar 02, 6:32am)
5. sql.getTable ( fullyQualifiedFieldObject )
  (Thu, Feb 22, 8:36am)
6. sql.getField ( fullyQualifiedFieldObject )
  (Thu, Feb 22, 8:34am)
7. FilterOut ( ListA ; ListB )
  (Wed, Feb 21, 6:11pm)
8. Char0 ( )
  (Sun, Feb 18, 2:35am)

RSS Feed of Custom Functions