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Re: RANDOMN function [message #86503 is a reply to message #86501]

Thu, 14 November 2013 07:38

Mats Löfdahl
Messages: 263
Registered: January 2012

Senior Member

Den torsdagen den 14:e november 2013 kl. 16:15:54 UTC+1 skrev fd_...@mail.com:
>> You will get better statistics the larger the set:
>
>> IDL> for e=1,9 do print,e,10d^e,mean(randomn(seed,10d^e))
>
>> 1 10.000000 0.0489258
>> 2 100.00000 0.0172675
>> 3 1000.0000 -0.0336368
>> 4 10000.000 -0.00799687
>> 5 100000.00 0.00208867
>> 6 1000000.0 -0.00101986
>> 7 10000000. -0.000105310
>> 8 1.0000000e+08 0.000104068
>> 9 1.0000000e+09 2.46072e-05
>
> Well, I don't see what you mean to be honest.

Just that a larger set is more likely to reproduce the statistics of the distribution that was used to generate it. How many times do you have to roll a dice to get 1/6 of each number to some specified accuracy?

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[Message index]

		RANDOMN function By: fd_luni on Thu, 14 November 2013 05:59
		Re: RANDOMN function By: Mats Löfdahl on Thu, 14 November 2013 06:46
		Re: RANDOMN function By: Russell Ryan on Thu, 14 November 2013 07:12
		Re: RANDOMN function By: fd_luni on Thu, 14 November 2013 07:25
		Re: RANDOMN function By: Russell Ryan on Thu, 14 November 2013 10:19
		Re: RANDOMN function By: fd_luni on Thu, 14 November 2013 07:15
		Re: RANDOMN function By: Mats Löfdahl on Thu, 14 November 2013 07:38
		Re: RANDOMN function By: Craig Markwardt on Thu, 14 November 2013 07:47
		Re: RANDOMN function By: fd_luni on Thu, 14 November 2013 08:50

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