Re: Getting randomic integers

["Luciano de Souza" <luchyanus@...>]

It works exactly as I want. I used math.random, but always got the same 
numbers, but if I call math.randomseed(os.time()) before, I always got 
different numbers. Thank you very much!



----- Original Message ----- 
From: "Eike Decker" <zet23t@googlemail.com>
To: "Lua list" <lua@bazar2.conectiva.com.br>
Sent: Saturday, January 16, 2010 8:28 PM
Subject: Re: Getting randomic integers


> The randomseed function takes one number that is being used to
> initialize the random number generator - otherwise, you'll always get
> the same random numbers.
>
> For example:
>
> math.randomseed(os.time()) -- initialize based on actual time
> for i=1,50 do print(math.random(100)) end -- generate random 50 random
> numbers between 1 and 100
>
> Check the manuals for accurate description though:
> http://www.lua.org/manual/5.1/manual.html#pdf-math.random
>
> Eike
>
> 2010/1/16 Luciano de Souza <luchyanus@predialnet.com.br>:
> > Hi all,
> >
> > I could not understand how to get a trully randomic integer. Suppose I 
> > need
> > 50 randomic integers each time I call a function. Serching in 
> > documentation,
> > I found two functions in Math module: math.random and math.randomseed.
> >
> > The first one is not what I want. Calling it, I got always the same 50
> > numbers. In Pascal, before using random functions, it's necessary to call
> > "randomize" which starts the randomic number generator. I don't know if 
> > it's
> > also necessary in Lua.
> >
> > But I try to use math.randomseed. The first tesst is:
> >
> > print(math.randomseed(100))
> >
> > print(math.randomseed(0, 100))
> >
> > Despite no errors, I dindn't get anything. So I ask: how to obtain 50
> > different integers each time I call the randoms functions?
> >
> > Luciano de Souza