On Sun, Mar 09, 2008 at 11:40:47AM -0500, Justin wrote: > I got the aggregate function for weighted average done. I finely left > alone for more than 10 minutes to actual get it written. It takes 2 > value input Weight and the Value. it will sum the weighted entries to > create the constant then does the normal formula, but does not > percentage number but averaged number. A simple change on the return > line it can do percentages.
If you're looking for performance, ISTM the best option would be to simply accumulate the weights and value*weight as you go and do a division at the end. That seems likely to beat any implementation involving array_append. Have a nice day, -- Martijn van Oosterhout <[EMAIL PROTECTED]> http://svana.org/kleptog/ > Please line up in a tree and maintain the heap invariant while > boarding. Thank you for flying nlogn airlines.
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