[Rd] R crashes using the em function of package mclust (PR#7719)

[murdoch at stats.uwo.ca]

On Mon,  7 Mar 2005 09:35:39 +0100 (CET), becker at kfs.oeaw.ac.at wrote
:

>Hi,
>
>I got the same problem like
>http://tolstoy.newcastle.edu.au/R/devel/04/11/1204.html
>
>R crashes when I use the em function from the mclust package on 
>univariate data and on a special case on bivariate data (when the matrix 
>is not provided as written in the manual).
>It seems as if the problem is the format of the data to be analyzed.
>
>Operating System: Windows XP (SP2)
>R version: R-2.0.1
>
>The following example causes a crash of R:
>
># univariate example
>require(mclust)
>X <- c(rnorm(100, mean=1), rnorm(100, mean=5))
># I also tried: X <- as.matrix(c(rnorm(100, mean=1), rnorm(100, mean=5)))
>Xmap <- cbind(c(rep(1, 100), rep(0, 100)), c(rep(0, 100), rep(1, 100)))
>Xm <- mstep(modelName="V", data=X, z=Xmap)
># CRASH:
>em(modelName=Xm$modelName, data=X, mu=Xm$mu, sigmasq=Xm$sigmasq, pro=Xm$pro)

Which version of mclust?  I just installed  2.1-8  and ran your code
in R-2.0.1 with no problem.

In any case, this looks more like an mclust problem than an R problem;
if you're using the current version, you should follow up with the
maintainer,   Ron Wehrens <R.Wehrens at science.ru.nl>.

Duncan Murdoch