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Random Mirror Match Up Percentages Off - Page 7

Forum Index > SC2 General
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Prev 1 5 6 7 8 9 Next All
jeebuzzx
Profile Joined January 2010
Canada365 Posts
April 10 2011 20:33 GMT
#121
map preferences might be affecting the ratio of races you face
Zeke50100
Profile Blog Joined February 2010
United States2220 Posts
April 10 2011 20:34 GMT
#122
Let's not have the word "significant" involved with "statistics" without actually knowing how statistics work, especially when it's "I feel like it's significant..." >.>
JDub
Profile Joined December 2010
United States976 Posts
April 10 2011 20:35 GMT
#123
On April 11 2011 05:33 jeebuzzx wrote:
map preferences might be affecting the ratio of races you face
Again, this would have no effect on the percentage of mirror match-ups that a RANDOM PLAYER would get. If you play R, it doesn't matter what the distribution is for the races of your opponents. You should still expect ~33% mirror match-ups.
sansalvador
Profile Joined December 2010
Austria308 Posts
April 10 2011 20:35 GMT
#124
Way too many PvPs here.
shinarit
Profile Joined May 2010
Hungary900 Posts
April 10 2011 20:37 GMT
#125
On April 11 2011 04:56 AmericanUmlaut wrote:
Show nested quote +
On April 11 2011 04:30 shinarit wrote:
On April 11 2011 04:14 Klive5ive wrote:
Random numbers are never actually "random" for computers so it's not inconceivable that there's something slightly wrong for random players.


Yeah, pseudo-random is much more evenly distributed than real random... So it would be surprising to find anything wrong with it... though we dont know the exact algorithm (or at least i dont, point me somewhere if i can find it there, straight from Blizz possibly).

This whole thread is incredible, but as a programmer, this post is my favorite.
d
Pseudo-random, by definition, is not random but statistically cannot be distinguished from random. A pseudo-random number generator that created numbers more evenly distributed than real random numbers would by that very fact reveal itself as non-random and could then be predicted to some extent without knowledge of the algorithm used ot generate the numbers. Thus, the generator would not be pseudo-random.

Thus, you are full of crap. QED.


I think you will be surprised and your world will be crushed: pseudo random generators are not random generators. They are ofcourse cannot be distinguished, but thats because random generator cannot be identified in a finite sample.
But what we were talking about were the random generators of our computers. And if you ever tried one of them (as a programmer you should have, i know i did), they produce a very even distribution, even in low size sample. Real random CAN produce it as well, but it tends not to.

So whats with the crap and all the crunchertalk? You demonstrate nothing, just throw in stuff everyone knows and which are irrelevant to the topic.
T for BoxeR, Z for IdrA, P because i have no self-respect
Tim17
Profile Joined January 2011
France39 Posts
April 10 2011 20:37 GMT
#126
The problem with that is that randomization is bound to the law of great numbers. So we can't evaluate how good is their matchmaking script unless we have data from a "great number" of games. In this case i think only blizzard can have collect data on such a large scale.
Probe1
Profile Blog Joined August 2010
United States17920 Posts
April 10 2011 20:38 GMT
#127
I've been getting a lot of mirror match ups but I don't have the solid statistical evidence. Is there an easier way to pull the matchup information than going to match history? It seems like a LOT of work to go back and check 40-50 games to see if it was or was not a mirror match by clicking every individual match.

Anyway, I seem to get a lot of mirror matches but i think random has a lot of weirdness about it. Last season I would pick random and get zerg 5-10 times in a row regardless of what my opponent was. I don't know if its perfect randomness and such.
우정호 KT_VIOLET 1988 - 2012 While we are postponing, life speeds by
savagebeavers
Profile Joined October 2010
Canada108 Posts
April 10 2011 20:41 GMT
#128
I would say i hit about 75% zvz this season sitting at around mid master. Out of about 60 games i have hit 3 Terrans
LambtrOn
Profile Blog Joined September 2010
United States671 Posts
April 10 2011 20:44 GMT
#129
I wouldn't say I've had a lot of TvT recently. TvP on the other hand seems to be around 60-70% for me.
JDub
Profile Joined December 2010
United States976 Posts
April 10 2011 20:48 GMT
#130
On April 11 2011 05:41 savagebeavers wrote:
I would say i hit about 75% zvz this season sitting at around mid master. Out of about 60 games i have hit 3 Terrans


On April 11 2011 05:44 LambtrOn wrote:
I wouldn't say I've had a lot of TvT recently. TvP on the other hand seems to be around 60-70% for me.

Did either of you read the OP? This is about RANDOM PLAYERS ONLY. If you are hitting a lot of P that has nothing to do with the amount of mirror match-ups that a random player will see. You are posting in the wrong thread.
Mastermind
Profile Blog Joined April 2008
Canada7096 Posts
Last Edited: 2011-04-10 20:51:23
April 10 2011 20:50 GMT
#131
When I play as protoss I get way more pvp then I should, and when I play as zerg I get way more zvz than I should. Both mirrors are around 50% I would say. I often will get a few pvps in a row. It pisses me off.
edit: this didnt start in season 2 though. This has been going on for about 2 months I would say.
AmericanUmlaut
Profile Blog Joined November 2010
Germany2577 Posts
April 10 2011 20:50 GMT
#132
On April 11 2011 05:37 shinarit wrote:
Show nested quote +
On April 11 2011 04:56 AmericanUmlaut wrote:
On April 11 2011 04:30 shinarit wrote:
On April 11 2011 04:14 Klive5ive wrote:
Random numbers are never actually "random" for computers so it's not inconceivable that there's something slightly wrong for random players.


Yeah, pseudo-random is much more evenly distributed than real random... So it would be surprising to find anything wrong with it... though we dont know the exact algorithm (or at least i dont, point me somewhere if i can find it there, straight from Blizz possibly).

This whole thread is incredible, but as a programmer, this post is my favorite.
d
Pseudo-random, by definition, is not random but statistically cannot be distinguished from random. A pseudo-random number generator that created numbers more evenly distributed than real random numbers would by that very fact reveal itself as non-random and could then be predicted to some extent without knowledge of the algorithm used ot generate the numbers. Thus, the generator would not be pseudo-random.

Thus, you are full of crap. QED.


I think you will be surprised and your world will be crushed: pseudo random generators are not random generators. They are ofcourse cannot be distinguished, but thats because random generator cannot be identified in a finite sample.
But what we were talking about were the random generators of our computers. And if you ever tried one of them (as a programmer you should have, i know i did), they produce a very even distribution, even in low size sample. Real random CAN produce it as well, but it tends not to.

So whats with the crap and all the crunchertalk? You demonstrate nothing, just throw in stuff everyone knows and which are irrelevant to the topic.

I was pointing out that your comment on pseudorandom algorithms was logically contradictory, because a pseudorandom generator that could be shown to have a more even distribution of values than a truly random source of numbers would by definition not be pseudorandom. This demonstrates that you either don't understand the words that you are using, or you're intentionally saying things that aren't true.

Your comment about pseudorandom behavior producing a very even distribution, "even in a low size sample," is a perfect example of the silliness of this entire thread, which probably only hasn't been closed yet because the mods were enjoying the TSL. No statistical observation based on a low sample size has any significance.
The frumious Bandersnatch
wherebugsgo
Profile Blog Joined February 2010
Japan10647 Posts
April 10 2011 20:53 GMT
#133
On April 11 2011 05:29 CakeOrI)eath wrote:
P vs
+ Show Spoiler +
W L
P 2 3
T 2 2
Z 5 4

T vs
+ Show Spoiler +
W L
P 2 1
T 4 4
Z 6 1

Z vs
+ Show Spoiler +
W L
P 0 3
T 2 1
Z 3 6



I've stared logging all my games since reset in a spreadsheet. When I first read your post I thought you were crazy, but my (admittedly small) dataset agrees with yours.
22/51 = 43%

I'm so rusty on my statistics I can't give you a precise confidence interval, but I think its a safe guess that 43% is well within it. This means I still think you're crazy but I'll be interested in tracking this over the whole season.


And you hit 11/51 P and 25/51 Z, so what's your point?

You can't conclude jack shit from any of this data.
Nazarid
Profile Joined February 2010
United States445 Posts
April 10 2011 20:58 GMT
#134
you have to remember you are playing RANDOM so that means 33.3333333**% chance to be any race every match up, the game isnt going to be like o you are random and hes Terran lets not give u the same % chance of being Terran because of it. honestly you being a random player means you will have a lot of mirrors because of the simple fact there are only 3 races, and well you are a Random player.
Randomize the world, and Life shall be given.
darklordjac
Profile Joined July 2010
Canada2231 Posts
April 10 2011 21:10 GMT
#135
It seems 60% of my games are zvz
OpAndroid
Profile Joined July 2010
United States84 Posts
April 10 2011 21:11 GMT
#136
I played 11 ladder games the other day, 8 of them were Zerg vrs. Zerg. Most days its pretty balanced, but I do get those days where there is just a huuuuuge sway in mirror matchups.
Zaqwert
Profile Joined June 2008
United States411 Posts
April 10 2011 21:33 GMT
#137
The human brain is a pattern recognition machine.

It does this so zealously it seeks out patterns where none exist.

Whether it's seeing shaes in the clouds or "patterns" in random numbers or events.

There's always a "pattern" if you really want to find one.

"omg a bunch of even numbers in a row"
"omg a bunch of odd numbers in a row"
"omg a bunch of multiples of X in a row"

etc.

Sample size, variance, etc. etc.

Another thing to bear in mind is that there are hundreds of thousands of people playing. Just due to the sheer number there are going to be some people who have very rare looking things happen to them.
Tossup
Profile Blog Joined September 2010
United States208 Posts
April 10 2011 21:36 GMT
#138
it probably feels like you have more mirror matchups because people don't like them very much. People probably just remember the matches more often because they don't like them.
neSix
Profile Blog Joined November 2004
United States1772 Posts
Last Edited: 2011-04-10 21:44:15
April 10 2011 21:42 GMT
#139
Now I'm not math major, and for the record I want to state that this post doesn't actually contribute to the thread in any manner, but I do want to ask...

I think 33% is not what you should be rolling for mirrors as random. I think it would be more like 11%, or 1/3 of 1/3. Allow me to explain:

Assume your possible race is set X, containing A, B, C.
Assume your opponents possible races are set Y, coincidentally also containing A, B, C.

Assuming that a random value is picked from set X to determine your race, you have an approximately 33% chance of rolling any given race. If at the same time, your opponent's race is also determined by randomly pulling a value from set Y, they also have a 33% chance of rolling any given race.

With these assumptions, I think we can state that you are 33% likely to get A from set X, but only 33% of THOSE times that A is pulled from set X will A also be pulled from set Y. Consequently, we must conclude that if you play random you should only be getting mirrors about 1/9 of the time (1/3 * 1/3).

Is that not correct?


Edit:
I'm just pointing this out to say that (as you have correctly noted) if your sample size were big enough to be significant, mirror matchups for random players would be occurring statistically too often if it were more than 11%, not 33%.
eVolvE342
Profile Joined January 2011
157 Posts
April 10 2011 21:47 GMT
#140
thats wrong nesix because when you enter a game one of the races is already determined. If you are random then at startup screen you have a 33% chance of getting every race still but the opponents race has been determined 100%. However if it is random vs random then your logic would hold.
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