On 21/04/11 09:59, li li wrote:
Dear all,
I wrote the following function previously. It worked fine with the old
mvtnorm package.
Somehow with the updated package, I got a error message when trying to use
the function.
I need some help. It is sort of urgent. Can anyone please take a look. The
function is the following.
Thank you very much!
Hannah
(1) In the first instance you should probably contact the maintainer of
the mvtnorm package:
require(utils)
maintainer("mvtnorm")
(2) The code you enclosed indicates that you don't understand anything
about functions. You have m, rho, k, and alpha given as *arguments*
to your function, and yet you specify them explicitly within the body
of the function. This makes no sense at all.
If you are going to do something it pays to *understand* what you are
doing rather than just slapping down some code at random and hoping
that it will work.
Delete the first four (non-blank!) lines of your code and then call
cc_f(10,0.1,2,0.5)
This does indeed throw an error --- from uniroot(). As I say, contact the
package maintainer.
cheers,
Rolf Turner
library(mvtnorm)
cc_f<- function(m, rho, k, alpha) {
m<- 10
rho<- 0.1
k<- 2
alpha<- 0.05
cc_z<- numeric(m)
var<- matrix(c(1,rho,rho,1), nrow=2, ncol=2, byrow=T)
for (i in 1:m){
if (i<= k) {cc_z[i]<- qmvnorm((k*(k-1))/(m*(m-1))*alpha, tail="upper",
sigma=var)$quantile} else
{cc_z[i]<- qmvnorm((k*(k-1))/((m-i+k)*(m-i+k-1))*alpha, tail
="upper", sigma=var)$quantile}
}
cc<- 1-pnorm(cc_z)
return(cc)
}
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
