Re: Matching random numbers

• To: mathgroup at smc.vnet.net
• Subject: [mg4670] Re: [mg4615] Matching random numbers
• From: Allan Hayes <hay at haystack>
• Date: Thu, 22 Aug 1996 03:55:21 -0400
• Sender: owner-wri-mathgroup at wolfram.com

```"A. Ortiz-Tapia" <ao202 at cus.cam.ac.uk>
[mg4615] Matching random numbers
writes

>>>>>>>>>>>>
I have written the following program:

In[3]:=
(count = 0 ;
Label[nextrandom];
pileup = pileup + 1;
x = Random[];
y = Random[];
a = Round[100*x];
b = Round[100*y];
If[a== b,Return[x], Goto[nextrandom]];
If[count == 5000, Break[]];
Goto[nextrandom])

The purpose of this program is to produce two inpendent random
numbers;match this two numbers by "converting" them to integers,
then if theyare equal print either of them (I choosed x), *and*
increment the valueof a variable, such that at the end I can have
5000 "matched" random
numbers. The program, so far, gives out *only one number*.

I would like to have some comments.
<<<<<<<<<<<<<<

Arturo,
The following, written in a functional style more suited to Ma,
seems to do what you want. I have replaced 5000 with 10.

(mat= {};
While[Length[mat] <10,
If[Round[100#1]==Round[100#2], AppendTo[mat,#1 ]
]&[Random[],Random[]]
]; mat)

{0.172357, 0.643095, 0.35482, 0.517124, 0.168319, 0.0228716,
0.183782, 0.406388, 0.0474315, 0.542734}

Allan Hayes
hay at haystack.demon.co.uk

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```

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