I noticed that STD() returns the sample standard deviation, which is the sensible thing for it to do. However, when working with data points sampled from a larger population (or a distribution), it's a bit of a hassle to type STD(x)*COUNT(x)/(COUNT(x)-1), and I noticed that Oracle has a function STDDEV_POP() which returns the population standard deviation, so I thought that maybe it'd be a good idea to implement this in MySQL as well. What do you think?
//C -- Carl Troein - Círdan / Istari-PixelMagic - UIN 16353280 [EMAIL PROTECTED] | http://pixelmagic.dyndns.org/~cirdan/ Amiga user since '89, and damned proud of it too. --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
