I thought of that but this routine is called potentially hundreds of times in a single method call and the i/o would kill the app.

>Why don't you take the contents of the array and jam it into a cursor?
>
>>Hi All.
>>
>>I'm in a bit of a problem here. I need to compute the standard deviation on an array of values. I know it's easy to do it on table data: CALCULATE STD(numfield). But what is the actual textbook formula? Anyone got a mathematics textbook handy or a darn good memory?