Explanation of "Weighted"

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Explanation of "Weighted"

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1pdxwoman
Feb 10, 2007, 7:25 pm

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2pdxwoman
Feb 10, 2007, 7:26 pm

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3pdxwoman
Edited: Feb 10, 2007, 7:30 pm

Looking for a detailed explanation of "weighted"...

Please don't send me to the thread "http://www.librarything.com/talktopic.php?topic=2844" because it doesn't explain what weighted is (as far as I can tell).

Thanks!

sorry about the stutter...

4AndrewB
Feb 10, 2007, 8:41 pm

Alright then, try this thread then http://www.librarything.com/talktopic.php?topic=6340 , the comment in it by "mangaroo" sums it up nicely...

"Weighted" sorts on an algorithm that privileges two factors: the obscurity of the books you have in common and the percentage of shared books in the user's library. The numbers in parentheses (1/2) are the number of books you share with the user (1) followed by the total number of books in that user's LT catalog (2).

5pdxwoman
Feb 10, 2007, 9:05 pm

ah ha.

Thanks!

6Morphidae
Feb 10, 2007, 10:33 pm

Someone want to explain the reasoning behind weighted? Why does it matter more than raw?

7AndrewB
Feb 10, 2007, 10:41 pm

Who said it does matter more? That's why you can easily switch between the modes.

8Morphidae
Feb 10, 2007, 10:51 pm

How about an answer to the first question then?

9boekerij
Feb 10, 2007, 11:18 pm

>6 Morphidae:

Thingamabrarians owning some thousands books and sharing some dozens of them with yours out of those of which Thingamabrarians are sharing thousands of copies--e.g. J. K. Rowling (Harry Potter) and Stephen King--might be less close to your proper interests than other Thingamabrarians sharing but a handful of books with yours if the latter are more obscure if not rare books and that all the wile they are a significant part of their (smaller) collection.

Thus, while most probably most top 50 libraries will contain a handfull of books by LT's top 20 authors--and share them with lots of others Thingamabrarians, the raw number in this matter wouldn't tell you that much about common personal interests, would it--apart of course from (common) huge taste for books. You might share dozens of (rather popular) books with most of those.

On the other hand, some smaller library, all the while that it might be countaining no more than say 200 books, but is sharing e.g. 5% of them (10 books only, that is) with yours might be a closer match to your very proper taste for books, the more when most of those 10 books only are rather obscure books, even some of them shared between both of you and none other.

Raw numbers just tell how many books both of you are sharing. Weighted numbers might tell you more about common specific taste.

10Morphidae
Feb 11, 2007, 9:16 am

Thank you! I needed that in "language speak" rather than "math speak." I understand now. Weighted doesn't do me much good though since my husband's huge Star Trek collection seems to be weighted the most so all I'm getting is people with huge Star Trek collections!

11shmjay
Feb 13, 2007, 10:47 pm

>10 Morphidae:

I’ll say. I’ve got 2200+ books in my collection, maybe about 150 of those are Star Trek novels and my "most similar" is someone whose entire library of books consists of 101 Star Trek novels.