Good coin toss code

T

ThySpektre

TH.net Regular
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Hello all.

I need a 50% probability generator.

Right now I am using:

(Random integer number between 1 and 2) Equal to 1

and I am getting a LOT more 1's that 2's

Ideas?

ThySpektre
 
AgentPaper

AgentPaper

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Try random integer between 1 and 100 is less than 50, and are you using test map to try it? make sure to have random seed on if you are (otherwise all your randoms will be...not random)
 
AceHart

AceHart

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> (Random integer number between 1 and 2) Equal to 1
> and I am getting a LOT more 1's that 2's

Sounds random to me.

In 10 tries, "1111111111" is just as likely as "1212121212"...
 
xPheRe

xPheRe

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Even if you try a thousand times getting a random number between 1 and 2 and all you get are 1's, you can't say this isn't random...
Just that you had bad luck (if you need a 2) :D
 
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Grundy

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AceHart said:
> (Random integer number between 1 and 2) Equal to 1
> and I am getting a LOT more 1's that 2's

Sounds random to me.

In 10 tries, "1111111111" is just as likely as "1212121212"...
Click to expand...
yea it is just as likely as 1212121212 but it is no where near as likely as all the other possiblities you could have. if you want to say what number in what order then they all have the same chances, but if you're talking about total 1s and total 2s then it is no where near the same. your chances of getting all 1s in 10 tries is 0.09765625%
you have 102.4 times more chances of getting anything other than all 1s and ther are only 10 other possiblities. each one is NOT just as likely as getting all 1s
 
T

ThySpektre

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LOL, Thanks Grundy.

I have a degree in advanced mathematics and was wondering where the previous replies were coming from LOL...

Acehart and xPheRe I'd like to play some poker with you guys :cool:

ThySpektre

AgentPaper, I'll try your suggestion and I see the same behaviour in test (with the random seed thing unchecked, and in Bnet)

Grundy said:
yea it is just as likely as 1212121212 but it is no where near as likely as all the other possiblities you could have. if you want to say what number in what order then they all have the same chances, but if you're talking about total 1s and total 2s then it is no where near the same. your chances of getting all 1s in 10 tries is 0.9765625%
you have 102.4 times more chances of getting anything other than all 1s and ther are only 10 other possiblities. each one is NOT just as likely as getting all 1s
Click to expand...
 
xPheRe

xPheRe

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Grundy said:
(...) your chances of getting all 1s in 10 tries is 0.09765625%(...)
Click to expand...
LOL! If this isn't bad luck... :D

I was talking about randomness, not about how many 1's and 2's you can count in 10 tries.
1111111111 sounds to me as random as 1211212212, even being less probable.

ThySpektre said:
Acehart and xPheRe I'd like to play some poker with you guys
Click to expand...
LOL! Maybe you know now why I don't play poker :D
 
T

ThySpektre

TH.net Regular
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Yes,

So whereas you cannot PROVE 10 1's in a row are not random (you also cannot prove they are) without knowing the algorithms guts, you CAN say with ever increasing PROBABILITY that it is not.

I'm an engineer at heart...<0.1% chance is good enough experimentation for me! :)

If I wax philosophical, I do not believe in ANY randomness in the universe...I simply want a better approximation of it here.

ThySpektre


AceHart said:
Hm...

Random has no history.
Neither is it supposed to meet your expectations.
Click to expand...
 
S

skyrider123

Guest
yeah just sounds like you had a bit of bad luck there man lol.
 
the Lumpy

the Lumpy

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Could it be that since it is a random integer it actually takes a random real number and converts it to an integer? Because I think conversion to an integer just drops the decimal part and doesn't round the number (i.e. 1.99 converted to an integer = 1).
Please correct me if I'm wrong. :D
 
DDRtists

DDRtists

ɹoʇɐɹǝpoɯ ɹǝdns
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ThySpektre said:
LOL, Thanks Grundy.

I have a degree in advanced mathematics and was wondering where the previous replies were coming from LOL...
Click to expand...

how old are you :eek:
 
mase

mase

____ ___ ____ __
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Im 15 too...
 
S

Sargon

New Member
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Back on topic.

I think there's something in the World Editor preferences relating to random stuff and Test Map. That might be affecting it, or you're just having a lucky (or unlucky, depending) streak.
 
T

ThySpektre

TH.net Regular
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I had tried the flag to unlock the random seed in the WE to no avail.

Changing the code as AgentPaper suggested gave much better "randomness".

ThySpektre
 
AceHart

AceHart

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> Changing the code as AgentPaper suggested gave much better "randomness".

Two guesses here:

1. You're happy with it. (important)
2. It's much less random than you think it is. (ignore this)
 
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