Hi:

Try (install package sos first if necessary):

library(sos)
findFn('M-estimator')

This produced 34 hits on my machine (not quite as productive as Petr's
search :), but it identifies a few packages that contain functions for
robust estimation. It's also a good way to get familiar with a very useful
search mechanism to find R functions in the maze of available packages.
Typing

RSiteSearch('M-estimator')

at the R prompt is another way to search within R.

HTH,
Dennis

On Fri, Aug 6, 2010 at 12:10 AM, Iasonas Lamprianou <lamprianou@yahoo.com>wrote:

>
> Dear colleagues
>
> can somebody help me by showing how we can compute m-estimators in R?
>
> thanks
>
> Dr. Iasonas Lamprianou
>
>
> Assistant Professor (Educational Research and Evaluation)
> Department of Education Sciences
> European University-Cyprus
> P.O. Box 22006
> 1516 Nicosia
> Cyprus
> Tel.: +357-22-713178
> Fax: +357-22-590539
>
>
> Honorary Research Fellow
> Department of Education
> The University of Manchester
> Oxford Road, Manchester M13 9PL, UK
> Tel. 0044  161 275 3485
> iasonas.lamprianou@manchester.ac.uk
>
>
>
>
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