comp.lang.idl-pvwave archive: archive » Random number generation

Home » Public Forums » archive » Random number generation

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Random number generation [message #92666 is a reply to message #92664]

Wed, 03 February 2016 16:38

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

On Wednesday, February 3, 2016 at 11:51:13 AM UTC-5, dave poreh wrote:
> Folks,
> Hi,
> I am working on some simulation problems, that I need to generate random numbers. When I use>
> print, mean(randomu(seed, 100000))
> 0.498516
> print, mean(randomn(seed, 100000))
> 0.00100909
> 1-the randomn is much better than randomu. why is that?
> 2-I am expecting very small number for mean of this random numbers, but as you see they are quite big (i am expecting in order of 10e-7).
> Is there any other way that i can use?
> Thanks for anykind of helps...
> Cheers,
> Dave

What kind of random numbers do you need? There are many kinds of random number distributions.

Alx is right, the average of a random sample will have some variance from the true average. They would not be random otherwise!

Report message to a moderator

[Message index]

		Random number generation By: d.poreh on Wed, 03 February 2016 08:51
		Re: Random number generation By: lecacheux.alain on Wed, 03 February 2016 09:48
		Re: Random number generation By: Craig Markwardt on Wed, 03 February 2016 16:38
		Re: Random number generation By: d.poreh on Thu, 04 February 2016 04:37
		Re: Random number generation By: Craig Markwardt on Thu, 04 February 2016 12:04

Previous Topic:	IDLWAVE Maintainer Wanted
Next Topic:	exelisvis.com is now harrisgeospatial.com

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 17:32:21 PDT 2025

Total time taken to generate the page: 0.00475 seconds