Re: [R] Question

From: Ted Harding <Ted.Harding_at_nessie.mcc.ac.uk>
Date: Wed 14 Dec 2005 - 03:47:41 EST


On 13-Dec-05 Prof Brian Ripley wrote:
> On Tue, 13 Dec 2005 Ted.Harding@nessie.mcc.ac.uk wrote:
>

>> On 13-Dec-05 Uwe Ligges wrote:
>>> Davia Cox wrote:
>>> [...]
>>>> My question is in order to run a true random sample,
>>>
>>> We have to disappoint you: Your computer cannot generate
>>> "true random samples".
>>
>> At least on Linux (and probably most Unix) systems,
>> /dev/random must be a pretty good approximation (provided
>> you don't over-work it ... ).

>
> See
>
> library(accuracy)
> ?trueRandom
>
> (for some definition of 'true').

Spot on! Thanks for this -- I wasn't aware of it previously.

The URL to HotBits in ?trueRandom is worth following, and the descriptions in "How it Works":

  http://www.fourmilab.ch/hotbits/how.html

are entertaining reading.

Best wishes,
Ted.



E-Mail: (Ted Harding) <Ted.Harding@nessie.mcc.ac.uk> Fax-to-email: +44 (0)870 094 0861
Date: 13-Dec-05                                       Time: 16:47:37
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