Re: Need help to custom the rand function ,
- From: Fred <himselff@xxxxxxxxx>
- Date: Thu, 31 Jan 2008 11:40:09 -0800 (PST)
On 31 jan, 14:29, The Natural Philosopher <a...@xxx> wrote:
Fred wrote:
Hi guys,
I was wondering how could i get a random number exemple between 1 and
100 but with n% of getting some value over a number x.
Thanks a lot in advance.
Fred
Never mind Jerry, No one else does.
So you want a random number from a weighted distribution?
Your spec doesn't contain quite enough data to formulate the formula,
since there are an infinite number of distributions that have N% over
value X..
One example, is that you first of all get a random number between 0 and
100: If this is greater than N, then select a random number greater than
X, else select one less than X.
So in pseudo code where RAND(X) returns a number between 0 and X-1...
if ((RAND(100))<N) THEN RETURN RAND(X) ELSE RETURN(X+RAND(100-X));
Thanks for the info, i wont mind on him then =)
Almost there with the code,
Let me add some real number in the exemple :
i know before the random what number i must have over let take 50 for
the exemple,
i also need the random to still pick between 0 and 100, but with a
chance of 60% (exemple) to draw something over 50 .
Thanks
.
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