[R] Error using function MVN in package MCLUST: Fortran symbol name not in DLL for package

Prof Brian Ripley ripley at stats.ox.ac.uk
Fri Dec 9 14:16:43 CET 2011

On Fri, 9 Dec 2011, Natalie Franklin wrote:

> Hi All,
> I need to fit a mutlivariate normal model to a dataset in order to 
> obtain the mean and covariance parameters. I see that the MVN 
> function in the MCLUST package can do this, however when I try to 
> run even the simplest example provided in the documentation, as 
> below, I get the following error:
> n <- 1000
> set.seed(0)
> x <- rnorm(n, mean = -1, sd = 2)
> mvn(modelName = "X", x)
> Error in .Fortran("mvn1d", as.double(data), as.integer(n), double(1),  :
>  Fortran symbol name "mvn1d" not in DLL for package "mclust"
> I cannot see a resolution to this in the list, and wonder whether I 
> need to load something else separately to the package? Could it be 
> that I need to load a separate DLL?

Please the footer of this message.  It works for me, and we need the 
'at a minimum' information we asked for to begin to guess what might 
be wrong for you.

However, this is pretty much overkill: there is nothing 'mutlivariate' 
about your example, and even if there were mean() and var() give the 
standard parameter estimates.

> Many thanks for your help.
> Natalie
> (PhD Student in Medical Statistics at Reading University)
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Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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