i wish that could work but need to keep track of the individual weights as its a percentage of the total amount of the weight.
I would never have thought the performance of the Array would suck this bad.
Martijn van Oosterhout wrote:
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,