> From: Prof Brian Ripley [mailto:[EMAIL PROTECTED]
>
> Ripley (1987) Stochastic Simulation, pp.80-1 for one. I am
> pretty sure it is Knuth's book, although I don't have that to
> hand. I attribute it to
> Moses & Oakford (1963).
Thanks to Brian, Peter and Duncan for the info. And I have
On Wed, 12 Nov 2003 12:00:06 -0500, "Liaw, Andy" <[EMAIL PROTECTED]>
wrote :
>This is obviously not efficient in high-level languages like R, but in terms
>of algorithm, it is a lot more efficient than check-and-reject. IMHO this
>should be described in some book, but I have not seen any book de
"Liaw, Andy" <[EMAIL PROTECTED]> writes:
> This is obviously not efficient in high-level languages like R, but in terms
> of algorithm, it is a lot more efficient than check-and-reject. IMHO this
> should be described in some book, but I have not seen any book describing
> it.
I'm pretty sure I
On Wed, 12 Nov 2003, Liaw, Andy wrote:
> As others already pointed out, the fast way is to use sample().
>
> What I'd like to add is the following, which I learned from peeking at the C
> code underneath sample(): To draw n samples without replacement from 1:N
> (N>=n), you only need a loop from
scribing
it.
Just my $0.02...
Andy
> -Original Message-
> From: Ragnhild Sørum [mailto:[EMAIL PROTECTED]
> Sent: Wednesday, November 12, 2003 9:26 AM
> To: [EMAIL PROTECTED]
> Subject: [R] repeat until function
>
>
> Hi,
>
> I'm in this situation:
> I w
> I what to generate N random numbers(integer) that are different from each
> other.
> One suggestion:
>
> tabel <- rep(NULL, N)
> for (i in 1:N){
> temp <- as.integer(runif(1,1,max))
> if(temp in tabel) {
> repeat (?) (temp <- as.integer(runif(i,i,max)))
> until (?) ((temp in tab
Dear Ragnhild,
You can break out of a loop (see ?break), but, if I understand correctly
what you want, why not just use sample(max, N)?
John
At 02:26 PM 11/12/2003 +, Ragnhild Sørum wrote:
Hi,
I'm in this situation:
I what to generate N random numbers(integer) that are different from each
2003 9:26 AM
To: [EMAIL PROTECTED]
Subject: [R] repeat until function
Hi,
I'm in this situation:
I what to generate N random numbers(integer) that are different from each
other.
One suggestion:
tabel <- rep(NULL, N)
for (i in 1:N){
temp <- as.integer(runif(1,1,max))
if(temp in ta
Hi,
I'm in this situation:
I what to generate N random numbers(integer) that are different from each
other.
One suggestion:
tabel <- rep(NULL, N)
for (i in 1:N){
temp <- as.integer(runif(1,1,max))
if(temp in tabel) {
repeat (?) (temp <- as.integer(runif(i,i,max)))
until (?) ((tem
