Message-ID: <3EB81F14.58853C53@math.mun.ca>
Date: 2003-05-06T20:46:12Z
From: Paul Y. Peng
Subject: Questons about R capabilities
Duncan Murdoch wrote:
>
> On Tue, 06 May 2003 15:27:20 -0400, you wrote in message
> <seb7d46c.048 at healthsmtp.nycnet>:
> ...
>
> >2) I am also interested in sampling from a multivariate normal distribution. I see that R has a command mvrnorm, but when I try to use it, I get a message to the effect that the command is not recognized. Is there something I must do to enable this command, or is it not available in version 1.7?
>
> When the help says "mvrnorm(MASS)", that means that the function is in
> the package called "MASS". You need to execute
>
> library(MASS)
>
> to get that function loaded onto the search path. You can see which
> packages are already there by executing
>
> search()
>
> Duncan Murdoch
You can also sample a multivariate normal distribution using rmvnorm
from a contributed package "mvtnorm". Execute
library(mvtnorm)
before using it.
Paul Peng