R help - Aug 2004 - How to randomize a set of integers in R

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Hello,

I want  to validate my data for working with CART.
I need to now how to create a randomized column of some 6800 intgers within R .
I did not understand the manual concerning the possibilities to random data,
sorry.
Thanks a lot for your help!

Susanne Osterkamp

Hi Susanne,
* Susanne Osterkamp <sokamp at web.de> [040819
15:52]:
> Hello,
> 
> I want  to validate my data for working with CART.
> I need to now how to create a randomized column of some 6800 intgers
> within R. 
Do you want to sample 6800 random integers? In that case try ?runif
(for uniform distribution) 

If you want to resample 6800 integers try ?sample

HTH
Olaf Mersmann

Use sample() in either case:

## randomly shuffle the elements of the vector `x':
rx <- sample(x, replace=FALSE)

## randomly draw 6800 integers between 1 and 6800:
x <- sample(6800, 6800, replace=TRUE)

Andy
> From: Olaf Mersmann
> 
> Hi Susanne,
> * Susanne Osterkamp <sokamp at web.de> [040819 15:52]:
> > Hello,
> > 
> > I want  to validate my data for working with CART.
> > I need to now how to create a randomized column of some 6800 intgers
> > within R. 
> 
> Do you want to sample 6800 random integers? In that case try ?runif
> (for uniform distribution) 
> 
> If you want to resample 6800 integers try ?sample
> 
> HTH
> Olaf Mersmann
> 
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