Pi Vs Random
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Pi Vs Random
12. Jan 2013 17:25:16 (11y 108d)
12. Jan 2013 17:25:16 (11y 108d)
something i just thrown together for people to play with:
1000 monkeys and 1000 typewriters got me thinking, how well would a random number generator guess the decimals of Pi?
you can change variable "num" to the amount of numbers you wish to try.
also just for people learning:
WHICH=1>
loop Num times###>
1: Check=random number>
2: compare Check to WHICH digit of Pi>
3: if Check=WHICH digit of Pi then WHICH + 1 and print existing succession and start '1:' again
###
GeSHi`ed javascript Quelltext für pVr
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| <script> num=5000; z=0;x=0;pi="1415926535897932384626433832795028841971693993751058"; for (var i=0;i<num;i++){Check=(Math.random()/Math.random())+".";Check=Check.substr(4,1);if (Check==pi.substr(z,1)){if (z>x){x=z;document.write("Currently: "+x+"<br>")}z++;}else{z=0;}} </script> |
1000 monkeys and 1000 typewriters got me thinking, how well would a random number generator guess the decimals of Pi?
you can change variable "num" to the amount of numbers you wish to try.
also just for people learning:
WHICH=1>
loop Num times###>
1: Check=random number>
2: compare Check to WHICH digit of Pi>
3: if Check=WHICH digit of Pi then WHICH + 1 and print existing succession and start '1:' again
###
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RE: Pi Vs Random
12. Jan 2013 20:31:59 (11y 108d)
12. Jan 2013 20:31:59 (11y 108d)
If you do a bit of maths, you can actual just calculate how well it does. (And you might just find it's as good at it as finding the decimals of 0 or any other sequence of digits.)
It could actually be a meaningful exercise, but more to realise how meaningless the "1000 monkeys and 1000 typewriters" thing is. ;)
B.t.w.: what is that piece of magic to get a random digit?
Regards,
downer... ehm... dloser
It could actually be a meaningful exercise, but more to realise how meaningless the "1000 monkeys and 1000 typewriters" thing is. ;)
B.t.w.: what is that piece of magic to get a random digit?
Regards,
downer... ehm... dloser
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RE: Pi Vs Random
14. Jan 2013 22:57:59 (11y 106d)
14. Jan 2013 22:57:59 (11y 106d)
i thought maybe the random function of js could be not 100% random. and so decided to divide 2 random numbers (usually <1) to give more chance of randomness ;)
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RE: Pi Vs Random
14. Jan 2013 23:39:32 (11y 106d)
14. Jan 2013 23:39:32 (11y 106d)
It isn't 100% random as that's pretty hard.
In any case, just applying some function to it to make it more random is a dangerous game. You wouldn't be the first person to shoot himself in the foot like that (for example, he might end up with Check being '.' instead of a digit). And think about it, if it were that simple, why wouldn't Math.random() already implement such tricks?
B.t.w.: you might want to check your "(usually <1)" statement. I'm not so sure about it.
In any case, just applying some function to it to make it more random is a dangerous game. You wouldn't be the first person to shoot himself in the foot like that (for example, he might end up with Check being '.' instead of a digit). And think about it, if it were that simple, why wouldn't Math.random() already implement such tricks?
B.t.w.: you might want to check your "(usually <1)" statement. I'm not so sure about it.
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