MathGroup Archive 2009

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Random choice


On 15 mai, 12:24, Ray Koopman <koop... at sfu.ca> wrote:
> On May 15, 1:17 am, Valeri Astanoff <astan... at gmail.com> wrote:
>
>
>
>
>
> > Good day,
>
> > Given this example :
>
> > In[1]:= RandomChoice[Range[500], 100] // Union // Length
>
> > Out[1]= 91
>
> > what is the best way to get *exactly* 100 different
> > random numbers ranging from 1 to 500 ?
>
> > Any piece of advice would be appreciated.
>
> > --
>
> > Valeri Astanoff
>
> RandomSample[Range[500], 100] // Union // Length
>
> Given the well-established meaning of m_Choose_n for sampling without
> replacement, whoever decided on the new terminology got RandomChoice
> and RandomSample backwards.- Masquer le texte des messages pr=E9c=E9dents=
 -
>
> - Afficher le texte des messages pr=E9c=E9dents -

Thanks, Ray, (and Daniel and...) to let me (and some other posters !)
know the existence of "RandomSample" : it does just what I was looking
for.

v.a.


  • Prev by Date: Preventing swapping (high memory use)
  • Next by Date: Map conditional sums by date
  • Previous by thread: Re: Random choice
  • Next by thread: Re: Is there a BNF for Mathematica?