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- Subject: Re: Getting randomic integers
- From: Majic <majic.one@...>
- Date: Sat, 16 Jan 2010 22:40:45 -0800
it's a bit of a shame you cannot seed it with the time in microseconds?
On Sat, Jan 16, 2010 at 3:05 PM, Luciano de Souza
<luchyanus@predialnet.com.br> wrote:
> 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
>
>