[erlang-questions] more random uniform

Bengt Kleberg <>
Sun Oct 27 17:28:24 CET 2013


My computer is not available right now, but my understanding is that using now() will make it really hard to reproduce that sequence again.



Bengt


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Från: Evgeny M <>
Till: "" <>
Kopia: "" <>, Bengt Kleberg <>
Skickat: 27-10-2013 4:35 em
Ämne: Re: [erlang-questions] more random uniform




1>  [erlang:spawn( fun() -> random:seed(X,Y,0), io:fwrite("~p ", [random:uniform(3)]) end ) || X<-lists:seq(1,10), Y<-lists:seq(1,10)].
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

BUT (now() instead of X, y, 0)

2>  [erlang:spawn( fun() -> random:seed(now()), io:fwrite("~p ", [random:uniform(3)]) end ) || X<-lists:seq(1,10), Y<-lists:seq(1,10)].
1 3 3 2 3 1 2 1 2 3 1 3 1 2 1 3 3 1 1 3 2 1 2 1 3 1 3 2 3 2 3 2 3 1 2 3 2 3 1 2 3 2 1 3 1 2 1 2 1 1 1 1 2 2 3 1 2 3 1 3 2 1 2 3 2 1 3 1 2 1 3 3 2 2 1 3 3 1 2 1 2 2 2 1 1 2 3 2 3 1 2 3 1 3 1 2 3 2 3 2



воскресенье, 27 октября 2013 г., 13:45:35 UTC+4 пользователь Bengt Kleberg написал:
Greetings,

When doing random:uniform/1 for small values, ie 3, the result is 1 the first time. Changing the seed does not help.
What am I missing?


Bengt

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