[R] how to randomize a vector

[Prof Brian Ripley]

?sample

On Sun, 11 Nov 2007, leffgh wrote:

>
> I have a vector whose length is nearly 70 thousand.
> I need randomize it for 1000 times .
> for randomizing , I mean ,the elements of the vector remain intact while
> their order in the vector get changed randomly.
> I have written a function which seems to be able to solve short vectors ,
> but waste  a lot of time when dealing with the the long vector mentioned
> above.
>
>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595