Good idea ... sort of like a look-up table.
Tom
At 03:40 PM 4/13/00, you wrote:
> There may be a much simpler way:
>
>For each ad, just have 1 field that specifies what % that ad should have.
>Whenever you add / edit an ad (maybe use a trigger), have it then fill in
>(or update) 2 more fields, call it N1 and N2, with the numbers from 0 to
>100 which represent that fraction they should get.. for example:
>
>
>Ad title Percent N1 N2
>Ad1 20 0 20
>Ad2 50 20 70
>ad3 30 70 100
>
>Now just generate a random number , R, from 0 to 100.
> Look for the ad where R is between N1 and N2
> I did something like that, and the ads come out remarkably close to the
>predicted frequency!
>
>Al Musella
>World Wide Websites
>
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Tom Forbes
Forbes Consulting
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