pseudorandom number generator algorithm

niconicx

can anyone tell me the algorithm for the pseudo random number generator? and how it works, i tried searching the net but to no avail.. thanks in advance, nico

Robert C Cartaino

niconicx wrote:

i tried searching the net but to no avail

Try this search: Random Number Generator Source[^]

Tim Craig

niconicx wrote:

i tried searching the net but to no avail..

Or this[^] one. :doh:

If you don't have the data, you're just another asshole with an opinion.

CPallini

See also here [^]. :-D

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

David Crow

Hey, I don't think that six you rolled is completly random. Since there are more pips on that face than the opposing face (one), it likely be up more often than not.

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

CPallini

Well I'm working on the anti-gravity vacuum glass box... :rolleyes:

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

niconicx

CPallini wrote:

See also here [^].

im sorry for being somewhat dumb.. but can you explain the picture? thanks.. regards :)

CPallini

Well it is a (pseudo: see David Crow's post...) random number generator device. :-D

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

Lim Yuxuan

LOL. It is a pratical random generator. I used to write numbers on my square eraser and toss them to decide my answer for Multiple Choice Questions during tests that I didnt study.

CPallini

I obtained better results even for tests I did study. :-D

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

modified on Tuesday, September 16, 2008 11:42 AM

Roger Wright

DavidCrow wrote:

there are more pips on that face than the opposing face (one), it likely be up more often than not.

Not really; they're only one-sixth as deep as the one on the opposite side.

"A Journey of a Thousand Rest Stops Begins with a Single Movement"

CPallini

I know, but the mass distribution is different. ;P

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

David Crow

Roger Wright wrote:

Not really;

How so?

Roger Wright wrote:

...they're only one-sixth as deep...

All pips are drilled to the same depth on a die.

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Roger Wright

Okay, so I was guessing... But seriously, it's only one part of the equation. On the pair of sides showing 6 and 1 pip, one can consider that a shift in the center of mass occurs equal to some distance proportional to the ratio of the mass of one pip to the entire die in the direction of the face with 1 pip. Call that distance (6-1)l = 5l, and its direction i .On an adjacent face, the 5 counters the 3 for a distance of (5-3)l = 2l in the direction j. Normal to the plane formed thus is the pair 4 and 3, at a distance l in the k direction. The total distance by which the centroid shifts is then sqrt(25+4+1)*l = 5.477*l. Its direction is left as an exercise for the student, but it is decidedly not toward the face showing a 1. Remember, too, that we can't just rely on the measure of missing plastic in the pips, but must add back the mass of the paint used to mark each, and that might have a specific gravity much higher or lower than the base material. For practical purposes, the amount shift in the center of mass is negligible compared to the random variations in surface texture of the felt on the table, and the influence of random air currents from breathing, talking, air conditioning, passers by, and the occasinal fart. :-D The outcome is close enough to random for any engineering use, though a mathematician might argue the point. ;P

"A Journey of a Thousand Rest Stops Begins with a Single Movement"

CPallini

Roger Wright wrote:

For practical purposes, the amount shift in the center of mass is negligible compared to the random variations in surface texture of the felt on the table, and the influence of random air currents from breathing, talking, air conditioning, passers by, and the occasinal fart.

Hey, you're definitely cheating: my (pseudo ;P ) random device rolls in a vacuum box! :-D

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

Roger Wright

Well then, I guess the only way to resolve the matter is for you to build your machine, then run it through 6^(6^6) iterations and see if the Universe ends. :-D

"A Journey of a Thousand Rest Stops Begins with a Single Movement"

niconicx · modified on Tuesday, September 16, 2008 11:42 AM

maybe ill try it