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Sckxyss ![]() Forum Senior Member ![]() ![]() Joined: May 05 2007 Location: Canada Status: Offline Points: 1319 |
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What exactly is it weighted on? And, I don't see how an album with one rating of 4 stars could get an average rating of 3.46. Could you explain more? I'm curious about exactly how this is calculated.
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OpethGuitarist ![]() Prog Reviewer ![]() Joined: June 25 2006 Location: United States Status: Offline Points: 1655 |
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Bacamarte is amazing and I'm glad they are in there (didn't notice that earlier)
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back from the dead, i will begin posting reviews again and musing through the forums
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martinn ![]() Forum Senior Member ![]() Joined: October 09 2006 Location: Argentina Status: Offline Points: 360 |
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Seconded! |
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Syzygy ![]() Special Collaborator ![]() ![]() Honorary Collaborator Joined: December 16 2004 Location: United Kingdom Status: Offline Points: 7003 |
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The top 100 still contains almost no albums that I've reviewed, but the current version gives a much better overview of the different genres than before.
I think that there should be an algorithm that takes Kobaian lyrics into account
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'Like so many of you
I've got my doubts about how much to contribute to the already rich among us...' Robert Wyatt, Gloria Gloom |
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Soul Dreamer ![]() Forum Senior Member ![]() ![]() Joined: October 17 2005 Location: Netherlands Status: Offline Points: 997 |
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The algorithm that is used here reduces the influence of the number of ratings further compared to the former algorithm, at least that's what I get from observing the list.
But how is it possible that (as an example) the weighted average of CTTE was 4.58 (I seem to remember, the old algorithm also weighted collaborators 2, >50 words 1.5 and others 1) and now it's 4.55 while the album holds the HIGHEST number of reviews??
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To be the one who seeks so I may find .. (Metallica)
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Yorkie X ![]() Forum Senior Member ![]() ![]() Joined: July 04 2007 Status: Offline Points: 1049 |
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Rocktopus ![]() Forum Senior Member ![]() ![]() Joined: March 02 2006 Location: Norway Status: Offline Points: 4202 |
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Yoy're talking like the new algo's made to include PFM in the top ten, as well as including more obscure albums in general. Its not. its obviously trying to be more accurate. If its successfull at that or not is another question. What an album costs in the US is irrelevant. The result of that would of course mean leaving out almost every non-englishspeaking record. Its useful learning new proggsters (especially in the UK and the US) that masterpieces of prog comes from all over the world. Edited by Rocktopus - July 10 2007 at 18:59 |
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Over land and under ashes
In the sunlight, see - it flashes Find a fly and eat his eye But don't believe in me Don't believe in me Don't believe in me |
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Dean ![]() Special Collaborator ![]() ![]() Retired Admin and Amateur Layabout Joined: May 13 2007 Location: Europe Status: Offline Points: 37575 |
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I don't care either way about the chart positions (obviously I like to see Floyd do well, but that's personal bias), however as a technical-type person I am intrigued by the maths behind the algorithm.
I haven't a clue how the weightings are done but I have a feeling that the weighting is based upon the ratings of other albums by the same artist.
Take a look at this: QUATERMASS "The Long Road" a single 190-word review by a non-colaborator/reviewer giving it a 1-star rating, yet the total is 3.51.
The only way I can see this occuring is if the 3.66 rating for Quatermass's previous album is taken into concideration.
![]() This would explain CTTE sudden drop from the top three.
Edited by darqdean - July 10 2007 at 19:07 |
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What?
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Evandro Martini ![]() Forum Senior Member ![]() Joined: February 08 2006 Status: Offline Points: 183 |
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From what I've seen, this new algo is much simpler.
The former considerated the note it received from all reviews (e.g: 10 reviews, 8 of 4, 1 of 3 and one of 5stars, would resul on 4.00) and also the amount of reviews. Now, I think this new one is only judging the average note. Of course, it has a pre-requisit of a number of reviews, like 30 or 40, otherwise an album reviewed by just one person, as masterpiece, would be on top. |
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"You’ll never make any money playing music that people can’t sing.” Keith Emerson's father
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Dean ![]() Special Collaborator ![]() ![]() Retired Admin and Amateur Layabout Joined: May 13 2007 Location: Europe Status: Offline Points: 37575 |
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But how the average ratings are calculated has changed, so your example of (10 reviews, 8 of 4, 1 of 3 and one of 5stars) now yields a lower value than 4.00
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What?
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bhikkhu ![]() Special Collaborator ![]() ![]() Honorary Collaborator Joined: April 06 2006 Location: A² Michigan Status: Offline Points: 5109 |
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I have yet to pay $50, or any price close to that for a PFM CD. Where do you shop? ![]() |
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Shakespeare ![]() Forum Senior Member ![]() Joined: July 18 2006 Status: Offline Points: 7744 |
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I've always thougt that, as well. Proto and Related should be on the site, but not on top 100, methinks. Edited by Shakespeare - July 10 2007 at 20:06 |
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Shakespeare ![]() Forum Senior Member ![]() Joined: July 18 2006 Status: Offline Points: 7744 |
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Now if only I could find somewhere to BUY THEIR MUSIC!!! ![]() |
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Drew ![]() Forum Senior Member ![]() ![]() Joined: June 20 2005 Location: California Status: Offline Points: 12600 |
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Images and Words at 66
what a fu**ing crime ![]() |
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Dean ![]() Special Collaborator ![]() ![]() Retired Admin and Amateur Layabout Joined: May 13 2007 Location: Europe Status: Offline Points: 37575 |
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http://www.progwalhalla.com/ definitely has it
lots of places to buy listed on this thread: http://www.progarchives.com/forum/forum_posts.asp?TID=39611&KW=buy
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Equality 7-2521 ![]() Forum Senior Member ![]() ![]() Joined: August 11 2005 Location: Philly Status: Offline Points: 15784 |
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If you're familar with how GPA's are calculated in college that's a weighted average.
Using wiki's notation:
![]() Let me use the GPA as an example. X-bar would be your GPA. To find this you use two inputs, one being X.
X is the grade you recieve for a given class. If you got an A, X=4. If you got a B, X=3. A C, X=2. Etc.
The second input is W. W is how many credits your course is. A 4 credit course has W=4. A 3 credit course, W=3. You get the idea.
Now say you take 3 courses,
So your values are as follows:
X1=4 W1=3
X2=4 W2=4
X3=3 W3=2
so your GPA, X-bar, is calculated like so
[ (X1*W1)+(X2*W2)+(X3*W3) ]
divided by
W1 + W2 + W3
So your GPA will be 3.78 because you have after plugging in ( 12 + 16 + 6 ) / (3 + 4 + 2)
In the case of the albums I'm assuming X will be the rating a reviewer gives the album, and W will be the status of the reviewer. A rating without a review being W=1, a rating with a review being W=2, and a rating with review from a collab being W=3?
Max or somebody will have to clarify exactly the inputs. I hope that clears it up.
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"One had to be a Newton to notice that the moon is falling, when everyone sees that it doesn't fall. "
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Soul Dreamer ![]() Forum Senior Member ![]() ![]() Joined: October 17 2005 Location: Netherlands Status: Offline Points: 997 |
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That's all extremely basic and straight forward, AND not different from the former algorithm! But how have THE NUMBER OF RATINGS been included here? Because I think there is the BIG difference with the former algorithm (which btw I think was better, and probably more stable for all ratings with more than 10 entries).
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To be the one who seeks so I may find .. (Metallica)
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Dirk ![]() Forum Senior Member ![]() Joined: August 11 2005 Location: Netherlands Status: Offline Points: 1043 |
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So all arguments that music like Bacamarte's or PFM's is unbuyable or unreasonable pricy don't stick. I agree with Opethguitarist that they're very very good. They're also not as obscure as people here seem to think, the album was in top 100 before the changes (around 70 th position iirc) and i guess that most people here who are interested in symphonic prog know the album or have at least heard about the band. |
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Dean ![]() Special Collaborator ![]() ![]() Retired Admin and Amateur Layabout Joined: May 13 2007 Location: Europe Status: Offline Points: 37575 |
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I agree, the weighting method Equality 7-2521 has explained is the old system.
Looking at albums with only one review it seems that anything with 3 or less stars is being marked up, while 4 or more stars gets marked down regardless of who the reviewer is. As someone in another thread has pointed out - a score of 3.54 is being awarded to albums with zero ratings
Because we cannot see all the non-review ratings it is difficult to reverse engineer the method - we are going to have to wait and see if the Admins are going to explain it
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What?
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Equality 7-2521 ![]() Forum Senior Member ![]() ![]() Joined: August 11 2005 Location: Philly Status: Offline Points: 15784 |
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I just explained the wiki article that Max linked and made predictions about how I thought it applied to the ranking system. As to how it actually does work I'm clueless and I don't care enough to look at some samples and figure it out.
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"One had to be a Newton to notice that the moon is falling, when everyone sees that it doesn't fall. "
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